Q. 16

# The length of the

Given:

Rate = Rs 9 per m2

Side a = 20 m

Side b = 21 m

Side c = 29 m Area of a scalene triangle = √(s(s-a)(s-b)(s-c))

Where,   s = 35 m

Now,

Area of triangular field = √(35 m × (35-20)m × (35-21)m × (35-29)m)

= √(35 m × 15 m × 14 m × 6 m)

= √44100 m2

= 210 m2

Total Cost = 210 m2 × Rs 9 per m2

= Rs 1890

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