Job Roles

What value replaces " ? " in the below figure ?

Veeru is the brother of the son of Raghu's son. Then what is the relationship of Veeru to Raghu ? 

Arun is father of 'B' but 'B' is not son of Arun then what is the relationship of 'B' to Arun ?

Mr. Karthik drives to work at an average speed of 48 km/hr. Time taken to cover the first 60% of the distance is 20 minutes more than the time taken to cover the remaining distance. Then how far is his office ?

Conditions:

I is brother of J

K is father of I

L is brother of M

M is daughter of J , then

Who is I to L?

There are seven persons P, Q, R, S, T, U and V up on a ladder(not in this order).P is further up than T but is lower than R. Q is in the middle. V is between P and Q. T is between Q and U. If U is between T and S, the person on the bottom step of the ladder will be ?

Three persons P,Q and R wore shirts of White, Black and Blue colours (not necessarily in that order) and pants of Green, Red and White colours (not necessarily in that order). No persons wore shirts and pants of same colour. And further it is given that

1.A did not wear shirt of Black colour.
2.B did not wear shirt of Blue colour.
3.C did not wear shirt of White colour.
4.A did not wear pants of Green colour.
5.B wear pant of White colour.

What were the colours of the pant and shirt wear by person A respectively?

Who invented waterproof fabrics ?