Question

Two train 50m and 110 m moving at34 km and 30 km per hour in opposite directions. How long would it take them to pass each other

Answer 1

Relative Speed = 30 + 40

                           = 70kmph

                          = 70 * 5/18

                          = 175/9

Distance = 50 + 110 = 160m

TIme = Distance/speed 

         = 160 * 9/175

         = 32 * 9/35
 
         = 32/5

         = 6.4


Hope this helps!