1. Three sides of a triangular field are of length 15 m, 20 m and 25 m long respectively. Find the cost of sowing seeds in the field at the rate of 5 rupees per sq.m.
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By: anil on 05 May 2019 01.57 am
Sides of triangle are 15,20,25 m Since, $$15^2 + 20^2 = 225+400 = 625 = 25^2$$ => The given sides are of right angled triangle. => Area of triangular field = $$frac{1}{2} * 15*20 = 150 m^2$$ => Cost of sowing seeds = 5 * 150 = Rs. 750
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