A) Neither loss nor gained
B) Gained Rs. 1
C) Lost Rs. 1
D) Gained Rs. 2
Correct Answer: C
Solution :
\[\because \]C.P. of first pipe\[=\frac{12\times 100}{(100+20)}=Rs.\,\,10\] \[\Rightarrow \]C.P. of second pipe\[=\frac{12\times 100}{(100-20)}=Rs.\,\,15\] \[\Rightarrow \]C.P. of both the pipes\[=10+15=Rs.\,\,25\] \[\Rightarrow \]S.P. of both pipes\[=12+12=Rs.\,\,24\] \[\therefore \]Loss on the whole\[=25-24=Rs.\,\,1\]
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