Question

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

• A. True
• B. False

Answer 1

The correct option is A

True

Curved Surface area of the pillar $=2\pi rh$

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

$=220m^2$

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

Hence, the given statement is true.