If an outlet pipe empties a full tank in 20 hrs then part of tank empt

1.	If an outlet pipe empties a full tank in 20 hrs then part of tank emptied in one hour.
A.	3?20
B.	2?5
C.	1?10
D.	1?20
Answer» E.

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If an outlet pipe empties a full tank in 20 hrs then part of tank emptied in one hour.

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