It is required to make a closed cylindrical tank of height 1m and base diameter 140 cm from a metal ...

Question

It is required to make a closed cylindrical tank of height 1m and base diameter 140 cm from a metal sheet How many square meters of the sheet are required for the same Assume 227

Accepted Answer

Let h be the height and r be the radius of a cylindrical tank.

Height of cylindrical tank, h = 1m

Radius = half of diameter = (140/2) cm = 70 cm = 0.7m

Area of sheet required = Total surface are of tank = 2πr(r + h) unit square

$[2 \times 22 / 7 \times 0.7(0.7+1)]$

= 7.48

Therefore, 7.48 square meters of the sheet are required.

NCERT Solutions Class 9 Mathematics Solutions for Surface Areas and Volumes - Exercise 13.2 in Chapter 13 - Surface Areas and Volumes