Ques:- The time taken by a train 180 m long, travelling at 42 kmph, in pasing a person walking in the same direction at 6 kmph, will be
A. 16 sec
B. 18 sec
C. 21 sec
D. 24 sec
Ques:- Which of the following is not the main head of expenditureof the central government?
A. Defence expenditure
B. Public health
C. Grants-in-aid
D. Interest of loans