A and B are traveling in the same duration. B is traveling at a constant speed of 55kmph and the distance between A and B is 1.5 km. If A crosses B within 1 minute, what is the speed of A?
Answers
A and B are traveling in the same direction.
B is traveling at a constant speed of 55kmph.
The distance between A and B is 1.5 km
A crosses B within 1 minute
Let's find out the relative speed between A and B.
Relative speed between A and B is 1.5 * 60 = 90 kmph
Since A and B are travelling in the same direction , Relative Speed = Speed of A - Speed of B
So, the speed of A = 55 + 90 = 145kmph
Hope it helps..!!
Thank you :)
Answer:
hence they both are traveling in same direction.so, first we need to find the relative speed .
relative speed = speed A - speed B.......(1)
But we don't know the speed of A so in order to find it ,we should observe the data given the question I.e,
The distance BTW A and B is 1.5km ,A crosses B within 1min(60sec)
the relative distance BTW A n B is 1.5*60=90(relative speed).
from eq(1):-
90=speed A -55. (frm given data speed B =55 ).
speed A=90+55.
hence, speed A =145kmph