Question

If motor pump 1 litre in 1 minute
2litre in 2minute
4 litre in 3 minute and its goes double on.
Suppose if a tank is fulfilled in 20 minutes
Then what is the time taken for filling half the tank​

Answer 1

Answer:

Given

time taken to fulfilled 1tank =20min

then, time taken to fulfilled 1/2 of tank =20*1/2min

=10min