A cylindrical stool has a base of diameter 70 cm and height 25 cm find the cost of painting 50 such stools if the cost per m sq is rs 55.

Step-by-step explanation:

Given

--- Diameter

--- Height

First, we calculate the surface area of 1 cylinder

This is calculated as:

The radius is calculated as:

The expression becomes:

Convert to

The surface area of 50 of such is:

The cost is then calculated as:

7 ft 6 in means 7 1/2, because 6 in is 1/2 of a foot. 7 ft 8 in means 7 2/3 because 8 in is 2/3 of a foot. 23/3 = 7 2/3. 15/2 = 7 1/2.

23/3   *   15/2   = 57 1/2

step-by-step explanation:

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