The volume of a right circular cylinder whose height is 40 cm and the

1.	The volume of a right circular cylinder whose height is 40 cm and the circumference of its base is 66 cm is(a) 55440 cm3 (b) 34650 cm3 (c) 7720 cm3 (d) 13860 cm3
Answer» (d) 13860 cm³ Given, 2πr = 66 ⇒ r = \(\frac{66\times7}{2\times22}= \frac{21}{2}\) cm ∴ V = πr²h = \(\frac{22}{7}\times\frac{22}{7}\times\frac{22}{7}\times40\) = 13860 cm³.

The volume of a right circular cylinder whose height is 40 cm and the circumference of its base is 66 cm is(a) 55440 cm3 (b) 34650 cm3 (c) 7720 cm3 (d) 13860 cm3

Answer»

(d) 13860 cm³

Given, 2πr = 66 ⇒ r = \(\frac{66\times7}{2\times22}= \frac{21}{2}\) cm

∴ V = πr²h = \(\frac{22}{7}\times\frac{22}{7}\times\frac{22}{7}\times40\) = 13860 cm³.