Question

"Question :It costs ₹4400 to cover the outer surface of wooden pillar 10m long. If the cost of carving is at the rate of ₹10per square m ,find (A)radius of the base
(B)outer curved surface area of the pillar
(C)amount of wood used in the pillar

Answer 1

Step-by-step explanation:

(a) total cost= curved surface area×10

=2πrl × 10

4400 =2πr×10×10

44= 2πr

r= 44/2π

r=44/(2×22/7)

r=44×7/44

r =7 m

(b) outer curved surface area=2πr l

=4400/10 ( from above explanation)

=440 m²

(c) amount of wood used=volume

volume=πr²×l

(22/7)×49×10

22×7×10

1540 m³

Hope it helps you ❤️❤️❤️