71
Each lap of a swimming pool is 50 m. Joey swims 30 laps.
How many kilometres does Joey swim altogether?
12
The thickness of a dictionary is 4.3 cm. What is the total height of a
stack of 50 such dictionaries? Give your answer in metres.
13
The total mass of 10 identical tins of milk powder is 16 kg.
What is the mass of 4 such tins?
14
The cost of 100 g of grapes is $0.55 at a supermarket.
What is the cost of 3 kg of grapes?
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