Question

41. The curved surface area of a
cylinder is 330 cm² and
the volume of the cylinder is
880 cm3. The diameter of a
cylinder is
(a) 8 cm (b) 7 cm
(c) 6 cm
(d) 8.5 cm​

Answer 1

Answer:

Base area of cylinder =πr

2

=38.5cm

2

(Given)

⇒πr

2

=38.5

⇒r

2

=

22

38.5×7

⇒r=

12.25

=3.5cm

CSA of cylinder =2πrh=176cm

2

(Given)

∴2πrh=176

⇒h=

2×22×3.5

176×7

=8cm

Therefore,

Volume of cylinder =πr

2

h

=

7

22

×(3.5)

2

×8=308cm

3