SOLUTION: When a train travels at 5/8 of its real speed it takes 1 hr 12 minutes more than the actual time if travelled at the real speed.The actual time to be taken to reach the destination
Algebra.Com
Question 1043092: When a train travels at 5/8 of its real speed it takes 1 hr 12 minutes more than the actual time if travelled at the real speed.The actual time to be taken to reach the destination is = ?
Answer by robertb(5830) (Show Source): You can put this solution on YOUR website!
Use the formula for the distance travelled by an object with speed r for an interval of time t.
Let the real speed of the train be r. Suppose the the distance to the destination is d. 5/8 of its real speed is ,
and the time travelled would be . Hence,
,
since 1 hour, 20 minutes is hours.
===> ===> , or d = 2r.
===> The actual time taken to reach the destination is hours.
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