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11. Find the cost of watering a trapezoidal ficld whose parallel sides are 10 m and 25 m respectively, tieperpendicular distance between them is 15 cm and the rate of watering is R 4 per m'. |
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Answer» Considering the distance between parallel sides (h) = 15 MLet one parallelside of the trapezoid be `a` = 10mAnother parallel side be `b` = 25mThe height that is the distance between the parallel sides = 15mArea = [(a+b)/2]h = [(10+25)/2×15] m² = [35/2× 15] m² = [17.5× 15]m² = 262.5 m²Cost of watering one m² area = Rs 4Cost of watering 262.5 m²area = Rs 1050 thanks |
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