Question

a cylindrical Tower is 5 metre in diameter and 14 M height find the cost of white washing on its curved surface at the rate of 50 paise per msq

Answer 1

Hey there!!
Given -
$d = 5 \\ = > r = \frac{5}{2} \\ h = 14 \: m \\ csa \: =2 \times \frac{22}{7} \times \frac{5}{2} \times 14 \\ = > 220 {m}^{2}$
Cost = Rate × Area

=> Pasie. - 50 × 220

=> paise 1100

Hope this helps u !!!

Answer 2

The cost of painting will be ₹110.

Given data :

Diameter of the tower = 5m

and ,height of the tower = 14 m

Painting cost = 50 paise/m²

Radius = 5/2 = 2.5 m

So,curved surface area of the tower = 2×π×2.5×14 = 2×22/7×2.5×14 = 220 m²

1 m² painting cost = 50 paise

220 m² painting cost = 220×50 = 11000 paise = ₹ 110 (answer)