Question

The cost of painting the curved surface area of a cylindrical pillar of height 10 m and radius 3.5 m, at Rs.10 per sq. meter is Rs. 2200.
(Take pi=$\frac{22}{7}$)

• A. True
• B. False

Answer 1

The correct option is A

True

Curved Surface area of the cylindrical pillar = 2πrh

Given that, radius = 3.5 m, height = 10 m.

$=2\times \frac{22}{7}\times 3.5\times 10$

$=220m^2$

So, the total cost = CSA of pillar $\times$ Cost per m${}^2$ = 220 $\times$ 10 = Rs. 2200

Hence, the given statement is true.