Meena fills a frustum-shaped paint drum to the brim with water. The drum has end radii 20 cm and 17 cm and a depth of 20 cm. Taking 1 cm³ of water as 1 gram and \π = 22/7 , find the mass of the water in kilograms.

Question

Accepted Answer

21.56 kg. V = 1/3 × 22/7 × 20 × (400 + 289 + 340) = 22/7 × 20 × 343 = 21560 cm³, so the water weighs 21560 g = 21.56 kg. 21560 kg forgets that 1000 g = 1 kg; 14.44 kg drops the Rr term; 64.68 kg forgets the 1/3 .

Meena fills a frustum-shaped paint drum to the brim with water. The drum has end radii 20 cm and 17 cm and a depth of 20 cm. Taking $1 cm^{3}$ of water as 1 gram and $π = \frac{22}{7}$ , find the mass of the water in kilograms.

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More Class 10 Frustum of a Cone practice

Meena fills a frustum-shaped paint drum to the brim with water. The drum has end radii 20 cm and 17 cm and a depth of 20 cm. Taking 1cm3 of water as 1 gram and π=722​, find the mass of the water in kilograms.

Step-by-Step Solution

Master this chapter in 30 minutes a day.

More Class 10 Frustum of a Cone practice

Meena fills a frustum-shaped paint drum to the brim with water. The drum has end radii 20 cm and 17 cm and a depth of 20 cm. Taking $1 cm^{3}$ of water as 1 gram and $π = \frac{22}{7}$ , find the mass of the water in kilograms.