Question

8. The cost of fencing a triangular field at the rate of Rs. 5 per meter is Rs. 1920. If semi-perimeter is 48cm, find its area and all sides. ​

Answer 1

Dear Student,

● Answer -

Area = l × b

l = 38.86 m

b = 15.14 m

● Explaination -

You haven't mentioned shape of the area, but from given information it seems to be rectangle.

Semiperimeter = l+b

48 = l + b

b = 48 - l

Area of field is -

Area = 1920 / 5

Area = 384 $m^{2}$

But we know,

Area = l × b

384 = l × (48-l)

384 = 48l - $l^{2}$  

$l^{2}$ - 48l + 384 = 0

l = 38.86 m

Now,

b = 48 - l

b = 48 - 38.86

b = 15.14 m

Hope it Helps..!!

Please Mark it as a Brainliest..!!

Please Follow me and Thank the answer...!!!