A) 6 min
B) 8 min
C) 10 min
D) 12 min
Correct Answer: C
Solution :
Time taken to fill the cistefnaU thethree pipes are opened\[=\frac{xyz}{yz+zx-xy}\,\,\min \] [Here \[x=12,\]\[y=15,\]\[z=20\]] Required time \[=\frac{12\times 15\times 20}{15\times 20+20\times 12-12\times 15}\] \[=\frac{3600}{300+240-180}=\frac{3600}{360}=10\]minYou need to login to perform this action.
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