Question

Find the time taken by a 150 m long train running at a speed of 60 km/hr to cross a pole.

• A. 9 seconds
• B. 8 seconds
• C. 9 hours
• D. 9 minutes

Answer 1

The correct option is A 9 seconds

$Speed=Distance÷Time$
$\therefore$ $Time=Distance÷Speed$
Distance = Length of the train = 150 m
Speed = 60 km/hr
To convert speed to m/sec, multiply 60 by $5÷18$
$\therefore$ Speed of the train
= $60\times \frac{5}{18}$ = $\frac{50}{3}$ m/sec
Hence, Time taken by the train to cross the pole = $150÷\frac{50}{3}$ = 9 seconds