1.

Two trains staring from the same place run at the rate of 50 km/hr and 55 km/hr respectively. What will they take to be 85 km apart, if they run in the same direction?1. 16 hrs2. 18 hrs3. 17 hrs4. 15 hrs

Answer» Correct Answer - Option 3 : 17 hrs

Given 

Speedof the train = 50 km/hr 

Speed2 of the train = 55 km/hr 

Distance = 85 km

Formula used ;

Time = distance/speed 

Calculation ;

We need to  get the relative speed both train in the same direction

⇒ 55 - 50 = 5 km 

Then, time = 85/5 = 17 hr

∴ Time is 17 hr.



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