Question

Two trains A and B start moving in the opposite direction at 7 am from the same point at speed 50 km/hr and 60 km/hr respectively. Find the distance between them at 9 am , given that train A is nonstop and train B takes three halts of 10 minutes each ?
1. 270 km
2. 190 km
3. 240 km
4. 300 km
5. 170 km

Answer 1

Correct Answer - Option 2 : 190 km

Given :

Speed of train A = S_A = 50 km/hr , Speed of train B = S_B = 60 km/hr

Formula Used :

 speed = distance/time

Calculations :

Distance traveled by train A in 2 hrs = 50 × 2 = 100 km

Distance traveled by train B in 2 hrs with halts  = 60 × ( 2 - 30/60) = 90 km

Since they are moving in opposite directions so, 

Distance between them =  ( 100 + 90 ) km = 190 km