Question

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 m2

Answer 1

Answer:

area of triangle =

s = a +b+c / 2

s = 50+65+65

s= 90

area of triangle = 1500m square

cost of laying grass = area *7

= 1500*7

= 10500

cost of laying grass = 10500

Step-by-step explanation:

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Answer 2

Answer:

According to the question,

Sides of the triangular field are 50 m, 65 m and 65 m.

Cost of laying grass in a triangular field = Rs 7 per m2

Let a = 50, b = 65,

c = 65 s = (a + b + c)/2

⇒ s = (50 + 65 + 65)/2 = 180/2 = 90.

Area of triangle = √s(s-a)(s-b)(s-c)

= √90(90-50)(90-65)(90-65)

= √90×40×25×25 = 1500m2

Cost of laying grass = Area of triangle × Cost per m2

= 1500×7

= Rs.10500

Step-by-step explanation:

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