The length and breadth of a playground are 75 m 20 cm and 34 m 80 cm respectively. Find the cost of leveling it at the rate of rupees 5.50 per square meter. How long will a boy take to go three times around the field, if he walks at the rate of 1.5m/sec ?
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Step-by-step explanation:
length=75*100+20=7520cm
breadth=34*100+80=3480cm
area=7520*3480=26169600cm^2=2616.96m^2
cost of levelling=5.50*2616.96=₹14393.28
distance=3*perimeter=3*(2*(75.2m+34.8m))
=3*(2*110)=3*220=660m
speed=1.5m/sec
time=distance/speed
time=660/1.5=440sec
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