Question

solve as soon as possible... it's urgent.... with full explaination...

Anwarbibi has spent Rs2664 at the rate of Rs18.50 per meter for fencing of her semicircular land. Let us write by calculating how much cost it will take, if she makes the semicircular land plough at the rate of Rs32 per square meters​

Answer 1

Answer:

₹39424

Step-by-step explanation:

shape : semi circle

fencing along : perimeter

formula : P : πr + 2r = r ( π+2)

fencing rate : ₹18.5/m

spent : ₹2664

now...since...

cost = rate × perimeter

2664 = 18.50 × P

P = 2664 / 18.5

P = 144 m

i,e r ( π+2) = 144

r ( 22/7 + 2 ) = 144

r (36/7) = 144

r = 144 × 7/36

radius : r = 28 m

now....since...

area of semicircular A = πr^2/2

A = 22/7 × 28 × 28 /2

A = 1232 m^2

ploughing rate : ₹32

ploughing cost = rate × Area

= 32 × 1232 = 39424

hence....

ploughing cost = ₹39424