The sides of a triangular field are 90 m, 120 m
and 150 m. Find the cost of levelling the field at
the rate of 1.20 per square metre.
pls every one I need an answer with proper explaination then I will mark that person as brain list answer
Answers
Answered by
2
Step-by-step explanation:
heron's formula for Area is square root of s(s-a)(s-b)(s-c) where s stands for (a+b+c)/2, wherein a,b and c are the sides.
s = (120+170+250) / 2 = 540 / 2 = 270
Area = square root of 270 * 150 * 100 * 20
= square root of 27*15 * 2 * 100000 — [there are 5 zeros above, isolate them]
= square root of 810 * 100000
= square root of 81 * 1000000 — [making it 6 zeros, to easily take sq.root]
= 9 * 1000 square meters
At 7.4 INR / sq.m, the cost is = 9000*7.4 = 66600 Rs.
Answered by
4
Step-by-step explanation:
answer is rupees 432 I solved so I got not clear
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