Rakesh has a rectangular field of length 80 m and breadth 60 m. In it, he wants to make a garden 10 m long and 4 m broad at one of the corners and at another corner, he wants to grow flowers in two floor-beds each of size 4 m by 1.5 m. In the remaining part of the field, he wants to apply mansures. Find the cost of applying the manures at the rate of Rs 300 per are.

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Solution

Length of the rectangular field = 80 m
Breadth of the rectangular field = 60 m

∴ Area of the rectangular field = 80 m x 60
= 4800 m²
Again,
Area of the garden = 10 m x 4 m = 40 m²
Area of one flower bed = 4 m x 1.5 m = 6 m²
Thus,
Area of two flower beds = 2 x 6 m² = 12 m²
Remaining area of the field for applying manure = Area of the rectangular field − (Area of the garden + Area of the two flower beds)
Remaining area of the field for applying manure = 4800 m² − (40 + 12 ) m²
= (4800 − 52 )m²
= 4748 m²
Since 100 m² = 1 are
∴ 4748 m² = 47.48 ares

So, cost of applying manure at the rate of Rs. 300 per are will be Rs. (300 x 47.48) = Rs. 14244

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