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प्रश्न
A conical pit of top diameter 3.5 m is 12 m deep. What is its capacity in kilo litres?
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उत्तर
Radius (r) of pit` = 3.5/2m=1.75m `
Depth (h) of pit = 12 m
Volume of pit = `1/3pir^2h=1/3xx22/7xx(1.75)^2xx12`
`=38.5m^3`
∴ Capacity of the pit = `(38.5xx1)`Kilometers
=38.5Kilo liters
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