Question

the height of a vight circular cylinder is 10.5cm there times the sum of the areas of its two circular faces it twice the area of curved surface . find the volume of the cylinder​

Answer 1

Answer:

ht. of a cylinder =10.5 cm

Let ′r′ be the radius of cylinder

Also, Area of 2 bases of cylinder =2(πr2)

C.S. Area of cylinder =2πrh

Acc. to question,

3(2πr2)=2(2πrh)

⇒36πr2=4πrh

⇒3r=2h

⇒3r=2×10.5=21

r=321=7

∴ radius of cylinder =7 cm

btw

Step-by-step explanation:

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