Question

A train 1km long is travelling 90km/h the train enters a tunnel 1km long. How long is it before the train emerges completely from the tunnel? Please show working out as well!

Answer 1

Step-by-step explanation:

total distance=1km+1km

=2km

speed =90km/hr

therefore, speed =distance/time

or,time=distance/speed

or,time=2km/90km/hr

or,time=1/45 hour

Hence,train will take 1/45 hrs to cross the tunnel completely

Answer 2

AnswEr :

• Total Distance = 1 + 1 = 2 Km
• Speed of Train = 90 km/hr

➟ Distance = Speed × Time

➟ 2 = 90 × Time

➟ Time = $\large\tt{\frac{2}{90}}$

➟ Time = $\huge\tt{\frac{1}{45}hr}$