Ques:- All natural numbers and 0 are called the _____ numbers.
A. whole
B. rational
C. integer
D. prime
Ques:- A train 280 m long is moving at 60 km/hr. Time taken by the train to cross a tunnel 220 m long is
A. 15 sec
B. 20 sec
C. 25 sec
D. 30 sec