Question

find the cost of a fencing a semicircular garde of 7m radius at rs 10 per metre

Answer 1

Fencing region =perimeter of semicircle
=πr+2r
= 22/7 *7 + 2*7
=22+14
=36m
Cost of fencing =36*10=Rs 360

Answer 2

Here radius of the semicircular garden is 7m .
Therefore Circumference of the semicircle = 1/2*2πr+2r
=
$1 \div 2 \times 2\pi \times 7 + 2 \times 7$
=36m
Therefore cost of fencing at ₹10 per metre
=36*10=₹360