Find the cost of laying grass in a triangular field of sides 50 m, 65 m and 65 m at the rate of Rs 7 per m square?

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Solution

$a = 50 m, b = 65 m, c = 65 m s = \frac{a + b + c}{2} = \frac{50 + 65 + 65}{2} = 90 Area = \sqrt{s (s - a) (s - b) (s - c)} = \sqrt{90 (90 - 50) (90 - 65) (90 - 65)} = \sqrt{90 (40) (25) (25)} = 25 \sqrt{3600} = 25 \times 60 = 1500 m^{2} . Cost of laying grass = 1500 \times 7 = Rs . 10500 ANS . . .$

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Find the cost of laying grass in a triangular field of sides 50 m, 65 m and 65 m at the rate of Rs 7 per m square?

a=50 m , b=65 m , c=65 ms=a+b+c2=50+65+652=90Area=ss-as-bs-c=9090-5090-6590-65=90402525=253600=25×60=1500 m2.Cost of laying grass=1500×7=Rs. 10500 ANS...