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प्रश्न
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.m2
उत्तर
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 m2
Cost of levelling per m2 = ₹ 45
∴ Cost of levelling 250 m2
= 250 × 45
= ₹ 11,250
Cost of levelling = ₹ 11,250
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