Question

A rectangular paper is 10 cm wide and 121 cm long and on folding around along its length, the two ends of the paper are brought together to form a right circular cylinder. Find the radius of the cylinder. right niraula​

Answer 1

Answer:

here is the answer:-

Radius of the cylinder = 6 cm

A rectangular paper is 10 cm wide and 12 pie cm long and Folded around along its length such that  the two ends of the paper are brough together to form a right circular cylinder.

Length become circumference of base of cylinder

circumference = 2 * π * Radius

2 * π * Radius = 12 π

=> Radius = 6 cm

radius of the cylinder = 6 cm

Step-by-step explanation:

Answer 2

Answer:

Since rectangular piece of paper of rolled along its length.

∴ 2πr = 22.

r = 22 × 7 / 2 × 22 = 3.5 cm.

Height of cyclinder (h) = 10 cm.

∴ Volume of cyclinder = πr^2h

= 22 / 7 × 3.5 × 3.5 × 10 = 385 cm^3.

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