The legth and the breadth of a playground are 80 m and 35 m respectively (i) find the cost of leveling it at ₹4.50 per square metre (i)how long will a boy take to go three times round the field , if he walks at rate of 1. 5 m per second ?
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L is 80m and B is 35m
area =80*35
=2800m^2
cost=area*rate
=2800*4.5
=12600rupees
area =80*35
=2800m^2
cost=area*rate
=2800*4.5
=12600rupees
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