the area of a rectangular field Is 12 5/8 m find its length.

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the area of a rectangular field Is 12 5/8 m find its length.

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hint

Given area of field = 3584m

2

length = 64 m

We know area – length × breadth = l×b

b=

64

3584

=56m

Now Perimeter of field = 2[l+b]

=2[64+56]

Perimeters of field = 2[120]= 240 m.

for 5 rounds perimeter = 240×5=1200m

Given speed of boy = 6 km/h = 6×

18

5

=

3

5

m/sec

then time taken to cover 1200 m distance =

5

1200

×3

Time = 240×3sec

or Time =

60

240×3

min=12min

∴ 12 min required to complete 5 rounds of field.