distance between two stations P and Q is 1200 kilometre the two cars start simultaneously from P and Q respectively towards each other and then the distance between them after 5 hours is 100 kilometre if the speed of the car A is less than the other car by 20 kilometre per hour then find the
●Speed of car A
●Speed of car B
●Distance between cars A and B after 4hours
●average speed of both car
Please answer with explanation.
Answers
Step-by-step explanation:
Let the trains start from station A and station B respectively.
Let the first train start from station A and the second train start from station B at the same time and move towards each other.
Let the speed of the first train be x km/hr
∴ the speed of the second train =(x+20) km/hr
Distance travelled by first train in 2 hours =2x km
Distance travelled by second train in 2 hours =2(x+20) km =(2x+40) km
Given, distance between two stations =300 km
According to the given condition, we have
Distance travelled by first train + Distance travelled by second train +20=300
i.e., 2x+(2x+40)+20=300
4x+60=300
4x=300−60 ....[Transposing 60 to RHS]
4x=240
Thus, x=
4
240
=60
∴ Speed of the first train =60 km/hr and
speed of the second train =(60+20) krn/h =80 km/hr.
Answer:
100
speed of car a is 100K
speed of car b is 120 km
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