Ratios And Rates Worksheet - Chapter 3 Page 31
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38A
Checking
A girl who measures 50 cm in length at birth will probably
1.
grow to an adult height of 165 cm. Based on this, what will be
the likely adult height of a girl whose length at birth is 48 cm?
B
Practising
For every 1.5 m of an iceberg that is above the water, 12.0 m
2.
of the iceberg is below the water. Suppose 9 m of an iceberg is
above the water. Is the iceberg 72 m in length from top to
bottom? Explain.
1.5 m
water’s surface
1 2 m
iceberg
A water tank holds 80 L. It is leaking at a rate of 1.5 L/min.
3.
How long will it take before these amounts leak out?
5 L
20 L
35 L
a)
b)
c)
About 22 out of 99 adult Canadians have difficulty reading.
4.
There are about 900 000 adults in Manitoba. How many
adults in Manitoba might have difficulty reading?
A 13-year-old’s heart might beat about 84 times per minute.
5.
About how long would it take her heart to beat 10 000 times?
6.
The ratio of the running speed of cats to domestic pigs to
chickens is 30 :11: 9. Approximately how many metres could a
pig and a chicken run in the time a cat takes to run 1 km?
1 km
1000 m.
132
Chapter 3
NEL
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