With an average speed of 40 km/ hr, a train reaches its destination in time. If it goes with an average speed of 35 km/hr, it is late by 15 minutes. The total journey is
Let the required distance be $$x$$ km
Acc to ques :
=> $$\frac{x}{35} - \frac{x}{40} = \frac{15}{60}$$
=> $$\frac{8x - 7x}{280} = \frac{1}{4}$$
=> $$x = \frac{280}{4} = 70$$ km
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