Question

The cost of painting curved surface area of a cylindrical pillar of height $10m$ and radius $3.5m$ at Rs. $10$ per $m^2$ is Rs. $2200$
[Take $\pi =\frac{22}{7}$]

• A. True
• B. False

Answer 1

The correct option is A

True

Curved Surface area of a cylinder of radius, $r$ and height, $h$ is $2\pi rh$

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

$=220m^2$

So, total cost $=$ Curved Surface Area of the pillar $\times$ Cost per $m^2=220\times 10=$ Rs. $2200$

Hence, the given statement is true.