A park is 1500 metres long and 750 metres wide. A cyclist has to take four rounds of this park. How much time he will take at the speed of 4.5km/h?
a) 40 hours
b) 20 hours
c) 10 hours
d) 4 hours
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parameter of park = 2 ( 1500 + 750) = 2250× 2 = 4500m
1km = 1000m
4500/1000 = 4.5km
he is traveling at speed = 4.5km/h
time = 4.5/4.5 = 1 hour ○,○
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