Question
A cylindrical tank of diameter 35 cm is full of water . If 11 litres of water is drawn off the water level in the tank will drop by :
Answer: Option B
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Let the drop in the water level be h cm . Then ,
`22/7 xx 35/2 xx 35/2 xx h `= 11000
`hArr h = ((11000 xx 7 xx 4)/(22 xx 35 xx 35))` cm
`hArr h = 80/7` cm = `11 3/7`cm.
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