A storage tank consists of a circular cylinder with a hemisphere adjoined on either end. If the external diameter of the cylinder be 1.4m and its length be 8m, find the cost of painting it on the outside at the rate of Rs. 10 per `m^2dot`

Explanation

To solve the problem, we need to find the cost of painting a storage tank that consists of a circular cylinder with a hemisphere on either end. Let's break this down step by step.

### Step 1: Identify the dimensions
- The external diameter of the cylinder is given as 1.4 m.
- The length of the cylinder is given as 8 m.
- The radius (r) of the cylinder and hemisphere can be calculated as:
\[
r = \frac{\text{Diameter}}{2} = \frac{1.4}{2} = 0.7 \text{ m}
...