Kamala has three cylindrical containers, each with radius 20 cm that she wants to fill with grain. If her bag of grain contains 100 kg of grain, and she fills all three containers to a height of 70 cm, how much grain will be left in the bag, if 1 kg grain occupies 3000 cm3 space? (Use π = \(\frac{{22}}{7}\))

Kamala has three cylindrical containers, each with radius 20 cm that she wants to fill with grain. If her bag of grain contains 100 kg of grain, and she fills all three containers to a height of 70 cm, how much grain will be left in the bag, if 1 kg grain occupies 3000 cm3 space? (Use π = \(\frac{{22}}{7}\)) Correct Answer 12 kg

Given

Radius of cylindrical container = 20 cm

Quantity of grain in a bag = 100 kg

Formula used

Volume of cylindrical container = πr2h

where r and h are radius and height of cylindrical container respectively

Calculation

Volume of conatiner = (22/7) × 20 ×20 ×  70

⇒ 22 × 400 × 10

⇒ 88000 cm3

Three cylindrical container contain = 3 × 88000

⇒ 264000 cm3

Quantity left in bag = (100 × 3000) - 264000

⇒ 3,00,000 - 2,64,000

⇒ 36,000 cm3

1 kg = 3000 cm3 (Given)

so, 1 cm3 = (1/3000) kg

⇒ 36,000 cm3 = (1/3000) × 36,000

⇒ 12 Kg

∴ 12 kg left in grain bag.

 

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