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A ground is in the form of isoceles trapezium with parallel sides measuring 42 m and 36 m long. The distance between the parallel sides is 30 m. Find the cost of levelling it at the rate of Rs 135 per sq. m. |
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Answer» Parallel sides of the trapezium a = 42 m; b = 36 m Also height h = 30 m Area of the trapezium = \(\frac{1}{2}\) x h x (a + b) sq. unit = \(\frac{1}{2}\) x 30 x (42 + 36) m2 = \(\frac{1}{2}\) x 30 x 78 m2 Area = 1,170 m2 Cost of levelling 1 m2 = Rs 135 ∴ Cost of levelling 1170 m2 = Rs 1170 x 135 = Rs 1,57,950 Cost of levelling the ground = Rs 1,57,950 |
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