Fractions And Percentages Worksheet Page 23
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28MEP Pupil Text 11
11.7
4
1
5.
In a school,
of the children are boys and
of these are colour-blind.
7
10
What fraction of the school are colour-blind boys?
1
1
1
cm
6.
A cube is made with sides of length
1
cm.
2
2
Find the volume and surface area of the cube.
1
1
cm
2
1
1
cm
2
1
3
7.
A petrol can holds
5
litres when full. How much petrol is in the can if it is
full?
2
4
3
8.
A car travels at 50 m.p.h. for
hour. How far does the car travel?
4
1
2
9.
Find the length of the unmarked side of this rectangle if its area is
1
m
.
2
3
m
5
1
10.
A recipe requires
kg of sugar for a cake. How many cakes could be made with
4
3
1
kg of sugar?
4
2
11.
Alison cycles 3 miles in
hour. What is her speed?
3
3
12.
It takes a factory
hour to assemble a finished product. How many items could
4
be assembled in an 8 hour day?
11.8 Compound Interest and Depreciation
When money is invested the interest is often compounded, which means that interest is
given on the interest.
Worked Example 1
A person invests £200 in a building society account which pays 4% interest each year.
Find the value of the investment after 3 years.
Solution
Interest of 4% will be added at the end of each year by multiplying by 1.04.
×
=
So,
value of account after 1 year:
£
200
1 04
.
£
208
×
=
value of account after 2 years:
£
208
1 04
.
£
216 32
.
×
=
value of account after 3 years :
£
216 32
.
1 04
.
£
224 97
.
.
256
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