# Ex 11.4, 5 - Chapter 11 Class 8 Mensuration

Last updated at Dec. 12, 2018 by

Last updated at Dec. 12, 2018 by

Transcript

Ex 11.4, 5 Find the height of the cylinder whose volume is 1.54 π^3and diameter of the base is 140 cm ? Given, Volume of cylinder = 1.54 π^3 & Diameter = 140 cm Radius = r = 140/2 cm = 70 cm = 70/100 m = 7/10 m We need to find height of the cylinder Let h be the height of the cylinder. Now, Volume of cylinder = ππ^2 β 1.54 = ππ^2 β ππ^2 β = 1.54 22/7Γ(7/10)^2Γβ = 1.54 22/7Γ7/10Γ7/10Γβ = 154/100 (22 Γ 7)/100 β = 154/100 (154 β)/100 = 154/100 154 β = 154 β = 154/154 β = 1 β΄ Height of cylinder = 1 m

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