Vermeerder
2.1 'n lengte van 21,6 m in die
verhouding 4 : 7.
Antwoord 2.1
2.2 'n wins van R3 672 in die
verhouding 4 : 5.
Ant. 2.2
2.3 'n massa van 91,2 kg in die
verhouding 7 : 5.
[ A 2.3 ]
Increase
2.1 a length of 21,6 m in the
proportion 4 : 7
Answer 2.1
2.2 a profit of R3 672 in the
proportion 4 : 5.
Ans. 2.2
2.3 a mass of 91,2 kg in the
proportion 7 : 5.
[ A 2.3 ]
Jan draf 5 km in 25 minute.
3.1 Hoe lank neem dit hom om 2 km
te draf?
[ A 3.1 ]
3.2 Hoe ver kan hy in 65 minute
draf?
[ A 3.2 ]
John jogs 5 km in 25 minutes.
3.1 How long does he take to jog
2 km?
[ A 3.1 ]
3.2 How far can he jog in 65
minutes?
[ A 3.2 ]
Marie verdien R30 per uur. Sy werk elke
weeksdag, Maandag tot Vrydag, vir 8
uur per dag.
4.1 Bereken haar weeklikse loon.
[ A 4.1 ]
4.2 Hoeveel uur moet sy werk om
R1 770 te verdien?
[ A 4.2 ]
4.3 Sy het R870 verdien. Hoe lank
het sy gewerk?
[ A 4.3 ]
Mary is paid R30 per hour. She works
every day from Monday to Friday, 8
hours per day.
4.1 Calculate her weekly wages.
[ A 4.1 ]
4.2 How many hours does she have to
work to earn R1 770?
[ A 4.2 ]
4.3 She earned R870. How many hours
did she work?
[ A 4.3 ]
'n Motor verbruik 47,32 liter petrol
om 613 km te ry.
5.1 Bereken die motor se brandstofverbruik
in km/liter en ook in liter/100 km.
[ A 5.1 ]
5.2 Hoe ver kan die motor ry as dit 21,4 ℓ
petrol teen dieselfde brandstofverbruik
verbruik?
[ A 5.2 ]
5.3 Hoeveel liter petrol sal die motor
verbruik om 430 km te ry?
[ A 5.3 ]
A motor car uses 47,32 litres of petrol to
travel 613 km.
5.1 Calculate the fuel consumption of the
car in km/litre (km/ℓ) and also in
litres/100 km (ℓ/100km).
[ 5.1 ]
5.2 How far can the car travel using
21,4 ℓ of petrol at the same fuel
consumption?
[ A 5.2 ]
5.3 How many litres of petrol will the car
use to travel 430 km?
[ A 5.3 ]
'n Plan van 'n gebou is geteken op
'n skaal van 1 : 50.
6.1 Watter afstand in die gebou word
voorgestel deur 'n afstand van
6.1.1 2 cm op die plan?
[ A 6.1.1 ]
6.1.2 35 mm op die plan?
[ A 6.1.2 ]
6.1.3 0,35 m on die plan?
[ A 6.1.3 ]
6.2 Watter afstand op die plan word
voorgestel deur 'n afstand
van . . . in die gebou?
6.2.1 35,4 m
[ A 6.2.1 ]
6.2.2 0,4 m
[ A 6.2.2 ]
6.2.3 1,26 m
[ A 6.2.3 ]
A plan of a building is drawn to a scale
of 1 : 50.
6.1 What distance in the building is
represented by a distance of
6.1.1 2 cm on the plan?
[ A 6.1.1 ]
6.1.2 35 mm on the plan?
[ A 6.1.2 ]
6.1.3 0,35 m on the plan?
[ A 6.1.3 ]
6.2 What distance on the plan is
represented by a distance
of . . . in the building?
6.2.1 35,4 m
[ A 6.2.1 ]
6.2.2 0,4 m
[ A 6.2.2 ]
6.2.3 1,26 m
[ A 6.2.3 ]
Die digtheid van 'n stof word
gedefinieer deur:
massa
digtheid van stof = ───────
volume
7.1 Watter hoeveelheid is direk eweredig
aan massa? Verduidelik.
[ A 7.1 ]
7.2 Die massa van 1 liter water is 1 kg.
Bereken die digtheid van
water in g/cm
3
[ A 7.2 ]
7.3 Die digtheid van goud is 19,3 g/cm
3
7.3.1 Bereken die massa van 6 cm
3
goud.
[ A 7.3.1 ]
7.3.2 Bereken die volume van 413,02 g
goud.
[ A 7.3.2 ]
7.3.3 Daar word beweer dat 'n ring met
massa 41,2 g en 'n volume van 2,4 cm
3
van suiwer goud gemaak is. Is die
bewering korrek? Verduidelik jou
antwoord.
[ A 7.3.3 ]
7.4 Die massa van 'n blokkie lood is 24,97 g
en die volume van die blokkie is 2,2 cm
3
7.4.1 Bereken die digtheid van lood.
[ A 7.4.1 ]
7.4.2 'n Tweede blokkie van lood het 'n
massa van 181,6 gram. Bereken die
volume van die blokkie.
[ A 7.4.2 ]
7.4.3 'n Kubus is van lood gemaak.
Die lengte van 'n sy is 2 cm. Bereken
die massa van die kubus.
[ A 7.4.3 ]
The density of a substance is defined
as:
mass
density of substance = ──────
volume
7.1 Which quantity is directly proportional
to mass? Explain.
[ A 7.1 ]
7.2 The mass of 1 litre of water is 1 kg.
Calculate the density of water
in g/cm
3
[ A 7.2 ]
7.3 The density of gold is 19,3 g/cm
3
7.3.1 Calculate the mass of 6 cm
3
gold.
[ A 7.3.1 ]
7.3.2 Calculate the volume of 413,02 g of
gold.
[ A 7.3.2 ]
7.3.3 It is claimed that a ring with a mass
of 41,2 g and a volume of 2,4 cm
3 is
made from pure gold. Is the claim
correct? Explain your answer.
[ A 7.3.3 ]
7.4 The mass of a block of lead is
24,97 g and the volume of the
block is 2,2 cm
3
7.4.1 Calculate the density of lead.
[ A 7.4.1 ]
7.4.2 A second lead block has a mass of
181,6 gram. Calculate the volume
of the block.
[ A 7.4.2 ]
7.4.3 A cube is made of lead. The length of
a side is 2 cm. Calculate the mass
of the cube.
[ A 7.4.3 ]
'n Pakkie pieangs, met massa
1,34 kg, kos R26,91.
8.1
Bereken die prys van piesangs
per kilogram.
[ A 8.1 ]
8.2
Wat sal 2,44 kg piesangs kos?
[ A 8.2 ]
8.3
'n Pakkie piesangs kos R8,63.
Wat is die massa van die pakkie?
[ A 8.3 ]
A packet of bananas, mass
1,34 kg, costs R26,91.
8.1
Calculate the price of the bananas
per kilogram.
[ A 8.1 ]
8.2
What will 2,44 kg of bananas cost?
[ A 8.2 ]
8.3
A packet of bananas costs R8,63.
What is the mass of this packet?
[ A 8.3 ]
Op 'n sekere dag is die prys van
Brent ruolie $69,29 per vat en die
Rand-VSA dollar wisselkoers
$1 = R14,12 .
9.1
Bereken die prys van 30 vate
in VSA dollar.
[ A 9.1 ]
9.2
Veronderstel dat 1 vat 'n inhoud
van 75 lter het. Bereken die
prys, in Rand, van 1 liter ru-olie.
[ A 9.2 ]
On a certain day the price of Brent
crude oil is $69,29 per barrel and the
Rand-USA dollar exchange rate
is $1 = R14,12 .
9.1
Calculate the price of 30 barrels
in USA dollar.
[ A 9.1 ]
9.2
Suppose that the capacity of 1 barrel
is 75 litres. Calculate the price,
in Rand, of 1 litre of crude oil.
[ A 9.2 ]
As $1 = R13,99 en £1 = R20,24,
bepaal, by benadring, hoeveel
dollar gelyk is aan £1
[ A 10. ]
If $1 = R13,99 and £1 = R20,24,
determine approximately how many
dollars are equal to £1
[ A 10. ]
'n Pakkie piesangs en 'n pakkie
tamaties het dieselfde massa.
Die waarde van die pakkie tamaties
is R40,00 en die van die piesangs
is R25,10. Die prys van die piesangs
is R20,08 per kilogram.
11.1
Bepaal die massa van die pakkie
piesangs.
[ A 11.1 ]
11.2
Bereken die prys van 1 kg tamaties.
[ A 11.2 ]
A packet of bananas and a packet of
tomatoes have the same mass.
The value of the packet of tomatoes
is R40,00 and that of the bananas
is R25,10. The price of the bananas
is R20,08 per kilogram.
11.1
Betermine the mass of the packet
of bananas.
[ A 11.1 ]
11.2
Calculate the price of 1 kg of
tomatoes.
[ A 11.2 ]