# Kalu a gardner,pulls water from a well of diameter 7m to irrigate his garden.He poures water plant to plant using a bucket. If he pulls up 200 buckets of total water,then water level falls down 10cm in the well.Find the capacity of the bucket in litre. (a)10 L (b)15 L (c)18.5 L (d)19.25 L

$Radius\;of\;well=\frac{7}{2}\; m\\*height\;of\;water\;level\;falls\;down=10\;cm=0.1\;m\\* volume\;of\;water\;needed\;for\;plants=200\times volume\;of\;1\;bucket\\* volume\;of\;water\;needed\;for\;plants=\pi\times (\frac{7}{2})^2\times 0.1\;m^3\\*volume\;of\;water\;needed\;for\;plants=3.8484\;m^3\\* Now,\\*3.8484\;m^3=200\times volume\;of\;1\;bucket\\* volume\;of\;1\;bucket=0.019242\;m^3\\* \because 1\;m^3=1000\;l\\* volume\;of\;1\;bucket=19.242l$

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