Question

The diameters of the two circular ends of the bucket are 44 cm and 24 cm. The height of the bucket is 35 cm. The capacity of the bucket is ______.

विकल्प

• 32.7 litres

• 33.7 litres

• 34.7 litres

• 31.7 litres

Answer 1

The diameters of the two circular ends of the bucket are 44 cm and 24 cm. The height of the bucket is 35 cm. The capacity of the bucket is 31.7 litres.

Explanation:

Given, diameter of one end of the bucket

2R = 44

⇒ R = 22 cm     ...[∵ Diameter, r = 2 × radius]

And diameter of the other end,

2r = 24

⇒ r = 12 cm   ...[∵ Diameter, r = 2 × radius]

Height of the bucket,

h = 35 cm

Since, the shape of bucket is look like as frustum of a cone.

∴ Capacity of the bucket

= Volume of the frustum of the cone

= `1/3 pi"h"["R"^2 + "r"^2 + "Rr"]`

= `1/3 xx [pi xx 35(22)^2 + (12)^2 + 22 xx 12]`

= `(35pi)/3 [484 + 144 + 264]`

= `(35pi xx 892)/3`

= `(35 xx 22 xx 892)/(3 xx 7)`

= 32706.6 cm³

= 32.7 litres   ...[∵ 1000 cm³ = 1 litre]

Hence, the capacity of bucket is 32.7 litres.