The length and breadth of a rectangular field
are in the ratio 5:4 and the area of this field
is 720 m². Calculate the cost of growing grass
at the rate of 12 per sq. metre over the area.
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Step-by-step explanation:
let,
l=5x
b=4x
Area= l×b
720m²= 5x × 4x
20x²= 720m²
x²=36m²
x=√36m²
= 6m
Length= 5×6m= 30m
breadth= 4×6m= 24m
the cost of growing grass = ₹12/m²× 720m²
=₹12×720
=₹8640
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