Question

el. A solid cylinder has a total surface area of 462cm. its curved surface area is one third of its total surface area.
The volumes of the cylender is
एक ठोस बेलन का कुल क्षेत्रफल 462 सेमी है। उसकी घुमावदार सतह का क्षेत्रफल कुल क्षेत्रफल का एक तिहारी हे । ठोस बेलन का आयतन
सात करो।​

Answer 1

Answer:

Total surface area (TSA) = 462 cm^2

Curved surface area (C.S.A) = 1/3 of T.S.A

= 1/3 * T.S.A = 1/3 * 462

= 462/3 = 154 cm^2

C.S.A= 2* πrh

T.S.A = 2tr ( +h)

Therefore, T.S.A/C.S.A = 2πr (r + h)/ 2πrh

= (r + h)/ h

T.S.A /C.S.A = 462/154 = 3

Therefore, we have (r + h)/h = 3

r + h = 3h

= 2h r

So, C.S.A = 2* πrh

1542*22/7 *r* r/2

154 22/7 r^2

r^2=154 7/22

r^2 = 7^2

Therefore, r = 7 cm

So, h= r/2 = 3.5 cm

So, the radius is 7cm and height is 3.5 cm

Step-by-step explanation:

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