Question

The ratio of length to breadth of a rectangular lawn is 3 is to5 it cost Rs 3200 200 @ to Amita what would be the cost of developing the lawn at the rate of Rs 10 per square metre

Answer 1

${\underline{\underline{Answer~:}}}$

Cost of 2 m=1 m

Cost of 1 m= 1/2 m

Cost of 3200 m=(1/2 3200) m.

= 1600 m

According to problem,

Let the length be 3x and breadth be 5x

2(length +breadth) =1600 m

=> 2(3x+5x) = 1600 m

=> 2*8 x = 1600 m

=> 16x = 1600 m

=> x=(1600/16) m

=> x= 100m

Therefore, length=3x=(3100)m =300m

Breadth=5x=(5*100)m

=500m

= (300*500) Sq.m

Area of the rectangle= lb

= 15000 sq.m

1 Sq. m costs= Rs. 10

= Rs. 150000

15000 Sq. m costs= Rs. (15000*10)

Ans:- Rs. 150000

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