Question: an outlet pipe empties a tank which is full in 10 hours . if the inlet pipe is kept open , which lets liquid in at the rate of 8 litres / min then outlet pipe would take 6 hours longer . find the capacity of the tank .
A) 8600 litres
B) 12800 litres
C) 12100 litres
D) 11200 litres
E) 13200 litres
Correct answer: B
Grade: 7 | Topic: Geometry | Difficulty: Hard | Standard: 7.G.B.6