Answer:
in 9 minutes tank will contain only 122 L of water
Step-by-step explanation:
tank contains = 400 L of water
it is tied at a rate of = 32 L in a minute
required quantity in the tank = 122 L
water to remove = 400 - 122 = 278 L
i.e.
let x be the time taken by the removable water
32 L are removed in 1 minute
278 L will be removed in x minutes
x = 278/32 = 8.7 = 9 minutes
thus,
in 9 minutes tank will contain only 122 L of water