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A water tank which is on ground has an arrangement to maintain a constant water level of depth 60 cm. Through a hole on its vertical wall at a depth of 20cm from the free surface water comes out and reaches the ground at a certain distance. To have the same horizontal range another hole can be made at a depth of

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10 cm

50 cm

40 cm

30 cm

answer is C.

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Detailed Solution

To have same range other hole should be made at (H – h)

$∴$ (60 – 20) = 40 cm

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