Question

Find the cost of laying grass in a triangular field of sides 13m , 13m , 10m at the rate of Rs7 per metre square
Rs 422
Rs 420
Rs 522​

Answer 1

Answer:

₹ 420 will be the answer

Step-by-step explanation:

the sides of the triangle be- A=13, B=13 ,C=10

let the 1/2 of the perimeter be s

so, S=(13+13+10)/2

S=18

so, now by Heron's formula!

√[S×(S-A)×(S-B)×(S-C)]

√[18×(18-13)×(18-13)×(18-10)]

= √ 18×5×5×8

= √3600

= 60 (area of traingle)

Now,

cost= ₹60×7

= ₹720

(not copied from Go.ogle)

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Answer 2

Answer:

please mark me the brainliest answer