Number And Algebra - Chapter 7 Applying Ratios And Rates - Nelson Think Math Page 30
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32Chapter 7 review
Understanding
1
Express 30 L in 4 hours as a rate in simplest form.
See Example 1
2
Find the average speed when a car travels 420 km in 6 hours.
Fluency
3
How much electricity is used by a 3600 W welder running for 5 hours?
See Example 5
4
Change 48 km/h to m/s.
See Example 2
5
Write each of the following in simplest form.
See Example 9
a
14 to 35
b
1 kg : 250 g
c
28 cm : 42 mm
Worksheet
3
9
3
7
d
0.4 : 2
e
:
f
3
: 1
Ratios and rates review
5
10
4
8
6
Write 28 : 2050 in the given form.
MAT08NAWK00049
a
1 : . . .
b
. . . : 1
See Example 8
7
Determine whether the following pairs of ratios are equivalent.
See Example 12
a
6 : 15 and 9 : 24
b
8 : 22 and 20 : 55
8
Share $60 in the ratio 7 : 8.
See Example 10
9
A map is drawn at a scale of 1 : 10 000. What is the real distance for a measurement of 2.4 cm
See Example 18
on the map?
10
The plans of a house are drawn to a scale of 1 : 100. Find the length in metres for the
See Example 18
following measurements on the plan.
a
length of the lounge room, 5 cm
b
length of the front wall, 23.4 cm
c
width of the front door, 1.8 cm
d
width of the garage door, 2.4 cm
267
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