In NCERT solutions , page no: 231 , 5th question , the second part is not clear for me , - Maths - Surface Areas and Volumes

Question

In NCERT solutions , page no: 231 , 5th question , the
second part is not clear for me , how come
[2*22/7*r*10]m = 110 m2 , which is [7/4] m = 1 75 m ?
this part of the answer is not clear for me so , experts pls can
explain this step by step pls don't ignore

Manvendra S. · Accepted Answer

Dear Student,

Please find below the solution to the asked query:

Here in the second part As we know the curved surface area of the vessel=110m2And in question vessel is 10m deep so that is the height of the vesselSo by using the formula Curved Surface area of the cylinder=2πrhPut the values⇒110=2×227×r×10⇒11010=2×227×r⇒11=2×22×r7⇒11×7=2×22×r⇒77=2×22×r⇒77=44×r⇒7744=r⇒1
75=rSor=1 75 m

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In NCERT solutions , page no: 231 , 5th question , the second part is not clear for me , how come [2*22/7*r*10]m = 110 m2 , which is [7/4] m = 1.75 m ? this part of the answer is not clear for me so , experts pls can explain this step by step..pls don't ignore..

In NCERT solutions , page no: 231 , 5th question , the second part is not clear for me , how come [222/7r*10]m = 110 m² , which is [7/4] m = 1.75 m ? this part of the answer is not clear for me so , experts pls can explain this step by step..pls don't ignore..