Question

the side of the equilateral triangular field is 124m find the cost of leveling it at the rate of Rs5 per sq.m

Answer 1

Explanation:

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9cm

$all \: side \: = 9cm \\ \\ area \: of \: equi. \: triangle = \frac{ \sqrt{3} }{4} \times {side}^{2} \\ putting \: the \: side \: 9cm \: in \: m \: = 129m\\ \frac{ \sqrt{3} }{4} \times {129}^{2} \\ \\ cost \: of \: leveling \\ \\ 1 {m}^{2} =rs. 5 \\ \frac{ \sqrt{3} }{4} \ \times {129}^{2} \times 25 \\ \frac{ \sqrt{3} }{4} \times 16641 \times 25$