Question

The cost of painting 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 pillar = 2πrh

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

$=220m^2$

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

Hence the given statement is true.