A triangular lawn with sides 26 m, 28 m and 30 m is to be turfed at Rs. 5 per square metre. What is the cost of turfing?
Correct answer D. Rs. 1,680
Explanation
s = 84/2 = 42. Area = square root of [42 x 16 x 14 x 12] = square root of 112896 = 336 sq m. Cost = 336 x 5 = Rs. 1,680.
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