Question

A paper 22cm long and 18cm broad has been turned into the shape of right circular cylinder along its length. find the volume and surface area of the cylinder so formed.

Please reply asap

Answer 1

Answer:

CASE  : 1

TAKING CIRCUMFERENCE AS 22cm AND HEIGHT 18 cm

2πr = 22 cm

πr = 11cm

* r = 11cm

* r = 1

2r = 7

r = 3.5 cm

VOLUME1 = πr2h

=  *  *  * 18

= 693 cm3   ---   (i)

CASE: 2

TAKING CIRCUMFERENCE AS 18cm AND HEIGHT AS 22 cm

2πr = 18

22/7 * r = 9

r = 2.8cm (approx..)

VOLUME 2 = πr2h

= 22/7 * 28/10*28/10 *22

= 542.08 cm3 -------(ii)

(i)-(ii)

693 – 542.08

= 150.92

Mark Me As Brainlist

Follow for more help

Thanks.