CBSE Class 10 Answered

Since the inner diameter of the glass = 5 cm and height = 10 cm, the apparent capacity of the glass = ?r2 h = 3.14 × 2.5 × 2.5 × 10 cm3 = 196.25 cm3 But the actual capacity of the glass is less by the volume of the hemisphere at the base of the glass. i.e., it is less by 2/3 ?r3 = 2 x 3.14 x 2.5 x 2.5 x 2.5 cm3 = 32.71 cm3 So, the actual capacity of the glass = apparent capacity of glass – volume of the Hemi-sphere = (196.25 – 32.71) cm3 = 163.54 cm2