Tap A and tap B together fill an empty tank of capacity 1500 litres in 1 hour. At what rate should the outlet pipe release the water to empty the tank in half an hour?
Answer & explanation
Correct answer: option 3
$\text{Tank capacity}=1500\text{ litres}.$
$\text{To empty the tank in }30\text{ minutes,}$
$\text{required outlet rate}=\frac{1500}{30}=50\text{ L/min}.$
$\text{Required outlet rate}=50\text{ L/min}.$