# Curved surface area of a right circular cylinder is 4.4 m². If the radius of the base of the cylinder is 0.7 m, find its height.

**Solution:**

The curved surface area of a right circular cylinder of the base radius 'r' and height 'h' is 2πrh

The curved surface area of the pillar = 4.4 m²

Radius of the cylinder, r = 0.7 m

Height of the cylinder, h = ?

2πrh = 4.4 m²

2 × 22/7 × 0.7 m × h = 4.4 m²

h = 7 × 4.4 m² / (2 × 22 × 0.7 m)

h = 1 m

The height of the right circular cylinder is 1 m

**Video Solution:**

## Curved surface area of a right circular cylinder is 4.4 m². If the radius of the base of the cylinder is 0.7 m, find its height.

### Class 9 Maths NCERT Solutions - Chapter 13 Exercise 13.2 Question 6:

**Summary:**

It is given that curved surface area of a right circular cylinder is 4.4 m² and the radius of the base of the cylinder is 0.7 m. We have found that the height of the right circular cylinder is 1 m.