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

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

["Assume "pi=22/7]

#### Solution

Height (h) of cylindrical tank = 1 m

Base radius (r) of cylindrical tank = (140/2)cm = 70cm = 0.7m

"Area of sheet required = Total surface area of tank "=2pir(r + h)

= [2xx22/7xx0.7(0.7+1)]m^2

= (4.4xx1.7)m^2

= 7.48m^2

Therefore, it will require 7.48 marea of sheet.

Concept: Surface Area of Cylinder
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#### APPEARS IN

NCERT Class 9 Maths
Chapter 13 Surface Area and Volumes
Exercise 13.2 | Q 2 | Page 216