Problem on Aptitude - Quant

Hi Friends,

Interesting Problem :-)..let me start with a mind exercise problem.

A milkman has two cans of 40 litres full of milk. As he goes around selling milk on his bicycle, two women approach him with jugs of 5 litres and 4 litres respectively. Each of them want to buy 2 litres of milk from the milkman.

How will the milkman measure and sell 2 litres of milk to both these women, using only these two cans and two jugs??

Let the solution be easy to comprehend.

a grocer uses weighing balance in which one pan weighs 0.5 kg and other 0.75 kg. He puts a certain quantity of food grains in 0.5 kg pan and finds weight as two digit number. However, as customer insists, he puts it in 0.75 kg pan. Now, the indicated weight is 9.5 kg more than weight which is obtained by reversing the digits of previous weight.
which of the following cannot be the actual weight??

1) 43.25
2) 36.25
3) 41.50
4) 32.25
5) more than one of these