A rectangular hall is measured 290 meter by 210meter. how long will it take for a boy to take two round around the hall , if he walks at the rate of 2.5 m/sec?
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Step-by-step explanation:
perimeter of hall= 2( 290+210)=1000m
according per question
2.5m in one second
therefore 1m in 1/2.5
since 1000m in 1/2.5*1000=400seconds
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