A rectangular water tank is 80 metre 40 metre. Water flows into it through a pipe of 40 sq.cm at the opening at a speed of 10 km/hr. The water level will rise in the tank in half an hour by

A rectangular water tank is 80 metre 40 metre. Water flows into it t

1.	A rectangular water tank is 80 metre 40 metre. Water flows into it through a pipe of 40 sq.cm at the opening at a speed of 10 km/hr. The water level will rise in the tank in half an hour by
A.	<table><tr><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>3</center></td><td rowspan="2">cm.</td></tr><tr><td style="text-align: center;">2</td></tr></table>
B.	<table><tr><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>4</center></td><td rowspan="2">cm.</td></tr><tr><td style="text-align: center;">9</td></tr></table>
C.	<table><tr><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>5</center></td><td rowspan="2">cm.</td></tr><tr><td style="text-align: center;">9</td></tr></table>
D.	<table><tr><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>5</center></td><td rowspan="2">cm.</td></tr><tr><td style="text-align: center;">8</td></tr></table>
Answer» E.

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A rectangular water tank is 80 metre 40 metre. Water flows into it through a pipe of 40 sq.cm at the opening at a speed of 10 km/hr. The water level will rise in the tank in half an hour by

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