Question

Ramesh sees a train passing over 1 km long bridge. The length of the train is half that of bridge. If the train clears the bridge in 2 minutes, the speed of the train is

• A. 45 km/hr
• B. 43 km/hr
• C. 50 km/hr
• D. None of these

Answer 1

The correct option is A 45 km/hr

(a)
Distance travelled in 2 minutes

$=(1+\frac{1}{2})kmi.e.\frac{3}{2}kms$

Distance covered in 1 hr =
$(\frac{3}{2}\times \frac{60}{2})km$

= 45 km

$\therefore$ Speed of the train = 45 km/hr