Question

A and b are travelling from one point by different trains in opposite directions.the speed of as train is 45 km/hr and that of bs train 35km/hr.how far away with a be from b after 4hrs

Answer 1

SPEED OF TRAIN A=45 KM/HR
SPEED OF B TRAIN =35 KM/HR
DISTANCE OF A TRAIN FROM B TRAIN IN 4 HOURS=35*4+45*4
=140+180 KM
=320 KM
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Answer 2

Answer:

As the trains travel in opposite direction then

Relative speed=(45+36)km/hr=

(81× 18/5 )m/sec=( 18/405 )m/sec

∴ length of the faster train=

18/405 ×8=180m