The length of the sides of a triangular field are 20 m, 21 m and 29 m. The cost of cultivating the field at RS. 9 per m2 is

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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