A train runs first 75 km at a certain uniform speed and next 90 km at an average speed of 10 km/h more than the normal s…
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A train runs first 75 km at a certain uniform speed and next 90 km at an average speed of 10 km/h more than the normal speed. If it takes 3 hours to complete the journey, then how much time will the train take to cover 300 km with normal speed?
✓ Correct answer: b) 6 hours
ExplanationA train runs first 75 km at a certain uniform speed and the next 90 km at an average speed of 10 km/h more than the normal speed.Let, the normal speed of the train = x km/hr x = - 5 OR x = 50 Speed can not be negative Therefore, x = 50 Hence, normal speed of train = 50 km/hr Time will the train take to cover 300 km with normal speed = Hence, Option B is the correct answer.
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