Question

A medicine-capsule is in the shape of a cylinder of diameter 0.5 cm with two hemispheres stuck to each of its ends. The length of entire capsule is 2 cm. The capacity of the capsule is

A. 0.36 cm³
B. 0.35 cm³
C. 0.34 cm³
D. 0.33 cm³

Answer 1

A. 0.36 cm³

Capacity of capsule = Volume of 2 hemispherical part + volume of cylindrical part

Now,

Diameter of capsule = 0.5 cm

Radius of capsule, r = 0.25 cm

[as radius = 1/2 diameter]

Also,

Radius of hemispherical part = Radius of cylindrical part = r

Height of entire capsule = 2 cm

Let the height of cylindrical part be h.

Then

Height of entire capsule = radius of 2 hemispherical parts + height of cylindrical part

⇒ 2 = 2r + h

⇒ 2 = 2(0.25) + h

⇒ h = 1.5 cm