SOLUTION: A train 600 metre long passes a car running at 72 km/hr in same direction in which the train going in 10 seconds. A. 108km/hr B.252 km/hr C.162km/hr D.225 km/hr

Algebra ->  Test -> SOLUTION: A train 600 metre long passes a car running at 72 km/hr in same direction in which the train going in 10 seconds. A. 108km/hr B.252 km/hr C.162km/hr D.225 km/hr      Log On


   

Question 858263: A train 600 metre long passes a car running at 72 km/hr in same direction in which the train going in 10 seconds.
A. 108km/hr
B.252 km/hr
C.162km/hr
D.225 km/hr
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
A train 600 metre long passes a car running at 72 km/hr in same direction in which the train is going, in 10 seconds.
:
Change the speed of the car to meter/sec
%28%2872%2A1000%29%29%2F3600 = 20 meters/sec
:
let s = speed of the train in meter/sec
write a distance equation, dist = speed * time
10(s - 20 ) = 600
10s - 200 = 600
10s = 600 + 200
10s = 800
s = 800/10
s = 80 meters per sec
:
In km/hr: %2880%2A3600%29%2F1000 = 288 km/hr
:
I know that is none of the answers, but that's what I get