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 always odd?
A. Sum of two odd numbers
B. Product of two odd numbers
C. Difference of two odd numbers
D. None of these