Question

Two cars pass each other in opposite direction. How long would they take to be 500 km apart? (I) The sum of their speeds is 135 km/hr. (II) The difference of their speed is 25 km/hr. *
Choice,,
1) Both I or II are not sufficient to answer.
2) Either I or II alone sufficient to answer.
3)I alone sufficient while II alone not sufficient to answer
4)II alone sufficient while I alone not sufficient to answer

Answer 1

Answer:

3 part

Explanation:

distance is given

and we need to find time so at last we are left to find speed only which would solve our question

speed is taken relative and relative speed when they are travelling in opp. direction is sum of both speeds..

Answer 2

Answer:

speed of one car is 80km/h

speed of other is 55km/h

s=d/t

time of first car is 6.25h

time of second car is 9.09h