Question

A train 110 metres in length passes a man walking at the speed of 6 km/hr, against it in 6 seconds. The speed of the train in km per hour is

• A. 60 km/hr
• B. 45km/hr
• C. 50km/hr
• D. 55 km/hr

Answer 1

The correct option is A 60 km/hr

(a)
Let the speed of the train in km/hr =x
Then,, relative speed =(x + 6) km/hr
$=(x+6)\times \frac{5}{18}m/\sec$
$\therefore (x+6)\times \frac{5}{18}\times 6=110$
$\therefore$ x = 60
$\therefore$ Speed of the train = 60 km /hr