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प्रश्न
The inner radius of a pipe is 2.1 cm. How much water can 12 m of this pipe hold?
उत्तर
Inner radius of pipe = 2.1 cm
Length of the pipe = 12 m = 1200 cm
∴ Volume = πr2h
= `22/7 xx 2.1 xx 2.1 xx 1200` cm3
= 16632 cm3
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