Q18Written answer
Question: 18
Have you heard about marathon races in which people have to run about 40 kilometres? People run marathons on roads because the track of a stadium is only 400 metres.
(a) 10 rounds of a stadium track = ________ km
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Worked solution
Answer: 10 rounds of a stadium track = 400 metres × 10
= 4000 metres
= 400 ÷ 1000
= 4 km
So, 10 rounds of a stadium track = 4 km
(b) So, if you run a marathon on a stadium track, you will have to complete rounds!
Answer: The number of rounds to be completed
= (40 × 100) ÷ 100
= 4000 ÷ 100
= 10
Hence, you have to complete 10 rounds on a stadium track
