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A field is in the shape of a right angled triangle whose base is 25 m and height 20 m. Find the cost of levelling the field at the rate of ₹ 45 per sq.m^{2}

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#### Solution

Area of a right angled triangle = `1/2 xx ("base" xx "height") "unit"^2`

base = 25 m

height = 20 m

∴ Area = `1/2 xx (25 xx 20)`

Area = 250 m^{2}

Cost of levelling per m^{2} = ₹ 45

∴ Cost of levelling 250 m^{2}

= 250 × 45

= ₹ 11,250

Cost of levelling = ₹ 11,250

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