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 The area of Rectangular field is 3584m square and its length is 64m .A boy runs around the field at the rate of 6km/h.How long    will he take to go 5 times around it?

 Breadth of the field = Area/length = 3584/64 = 56m

Perimeter of the field = 2*(64+56) = 240m

The boy covers five rounds of the field so the total distance covered by the boy = 240*5 = 1200m or 1.2km

Now time = distance/speed = 1.2/6 = 0.2 hrs = 12min

So the boy will go five times around the field in 12 min.

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The area of the rectangular park = 3584 square m or 3.584 square km
Length of the rectangular park = 64 m
Breadth of the rectangular park = Area / Length
                                               = 3584/64
                                               = 56
Therefore the breadth of the rectangular park is 56 m
Perimeter of the field = 2(l + b)
                                = 2(64 + 56)
                                = 2(120)
                                = 240 m
5 times=240*5= 1200 m =1.2 km
time taken = 1.2/6 hrs = 0.2 hrs = 12 minutes
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