Question

The radius of a field in the form of a sector is 21cm. The cost of constructing a walk around the field is Rs.1875 at the rate of Rs.25 per meter. If it costs Rs.10 per m² to till the field, what will be the cost of tilling the whole field ?

Answer 1

Answer:

3465 rupees

Step-by-step explanation:

r = 21 cm

total cost = 1875

cpm = 25

metres= 1875/25 = 75

75 = 2r + theta/360 x 2x22/7xr

theta= 90 degrees

area = 1/4 x 22/7 r^2

= 346.5 m^2

cost = ans x 10

= rupees 3465