You have two beakers – one of 4 liters and other of 5 liters. You are expected to pour exactly 7 liters in a bucket. How will you complete the task?
step 1: first fill 5 litre beaker and empty it by pouring into 4 litre beaker.you are left with 1 litre in 5 litre beaker.pour this 1 litre in the bucket.
step 2: repeat step 1 so that now you will have 2 litres in the bucket.
step 3: fill 5 litre beaker and add it to the bucket.
now you have 7 litres in the bucket.