Tick (✓) the correct answer


Tick (✓) the correct answer:

6 pipes fill a tank in 120 minutes, then 5 pipes will fill it in

(a) 100 min

(b) 144 min

(c) 140 min

(d) 108 min


(b) 144 min

Let x min be the time taken by 5 pipes to fill the tank.

No. of pipes 6 5
Time (in min) 120 x">x

Now, $6 \times 120=5 \times x$

$\Rightarrow x=144$

Therefore, 5 pipes will take 144 min to fill the tank.

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