SOLUTION: Two trains going in opposite directions leave at the same time. train b travels 15 mph faster than train a. in 8 hours the trains are 920 miles apart. find the speed of each
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Question 966609: Two trains going in opposite directions leave at the same time. train b travels 15 mph faster than train a. in 8 hours the trains are 920 miles apart. find the speed of each
Answer by macston(5194) (Show Source): You can put this solution on YOUR website!
The combined speed of the trains is 920 miles/8 hours=115 mph
a=speed of train a and a+15mph=speed of train b:
a+a+15mph=115 mph Subtract 15 mph from each side.
2a=100 mph Divide each side by 2.
a=50 mph ANSWER 1: The average speed of train a was 50 mph.
a+15mph=50 mph+15 mph=65 mph ANSWER 2: The average speed of train b was 65 mph.
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