Question

a rectangular field is 90 m by 70 m
A man walks around it at the rate of 4 km per hour what time will it take in making 5 rounds

Answer 1

perimeter of the field= 0.24km=240m.[2(L+b)]
when he walks 5 rounds, he covers 0.24×5=1.2km.
He can do 4km/hr=speed
time=distance/speed
time taken=1.2/4
time taken =0.3hrs=18mins
Hope this helps
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