SOLUTION: a car travelling at 40km/hr complete a journey in 2 hours. how long will it take to complete the same journey, if the speed is increase to to 60km/hr ?

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Question 1142407: a car travelling at 40km/hr complete a journey in 2 hours. how long will it take to complete the same journey, if the speed is increase to to 60km/hr ?
Answer by ikleyn(52765) About Me  (Show Source):
You can put this solution on YOUR website!
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Let "t" be the time under the question.


Then you can write this equation


    40*2 = 60*t,


saying that the distance is the same in both cases.


From the equation find the time  t = %2840%2A2%29%2F60 = 80%2F60 = 4%2F3 = 11%2F3 of an hour = 1 hour and 20 minutes.    ANSWER

Solved.