[Rs.54] Sam cuts grass at Rs.0.10 per square meter.How much does Sam earn cutting this area?

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Sam cuts grass at Rs.0.10 per square meter.How much does Sam earn cutting this area?

Rs.54

Rs.56

Rs.57

Rs.58

Explanation:

area grass

Lets break the area into two parts:

Part A is a square:

Area of A = a² = 20m × 20m = 400m²

Part B is a triangle. Viewed sideways it has a base of 20m and a height of 14m.

Area of B =$\dfrac{1}{2}\left(b \times h \right)$ = $\dfrac{1}{2}\left(20 \times 14 \right)$ = 140m²

So the total area is:

Area = Area of A + Area of B = 400m² + 140m² = 540m²

Sam earns Rs.0.10 per square meter

Sam earns = Rs.0.10 × 540m² = Rs.54

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