Average age of a 10 members committee is same as it was 4 years ago, because an old member is replaced by a younger member. What is difference between the younger member and the old member age. Or in other words, how younger he is from his counterpart?

may be a is the age of old member at first time b is the age of younger one afer 4 year

so (a+x)/10 = (b+x+36)/10 now its gives result a=b+36 though it was the younger ones present age so difference will be 36-4=32

Aakash walks 30 m North, then he turns right and walks 60 m. Again he turns right and walks 45 m. How far and in which direction is he now from his initial position?

The average age of a 10-members committee is the same as it was 4 years ago, because an old member has been replaced by a young member.

How many years younger was the new member than the old member he replaced?