A compound pipe of diameter d1, d2 and d3 having lengths l1, l2 and l3 is to be replaced by an equivalent pipe of uniform diameter d and of the same length (l) as that of the compound pipe. The size of the equivalent pipe is given by

A compound pipe of diameter d1, d2 and d3 having lengths l1, l2 and l3

1.	A compound pipe of diameter d1, d2 and d3 having lengths l1, l2 and l3 is to be replaced by an equivalent pipe of uniform diameter d and of the same length (l) as that of the compound pipe. The size of the equivalent pipe is given by
A.	<img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/170-247-1.png">
B.	<img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/170-247-2.png">
C.	<img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/170-247-3.png">
D.	<img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/170-247-4.png">
Answer» E.