Question

A train 210 m long took 12 seconds to pass a 90 m long tunnel. Find the speed of
the train.according to varition method​

Answer 1

Answer:

To pass the tunnel completely the train has to travel a distance of 300m

so,

D=300m

T=12s

S=D/T =300/12 =25m/s

Answer 2

☛ Question :-

A train 210 m long took 12 seconds to pass a 90 m long tunnel. Find the speed of the train.

☛ To find :-

• The speed of train

☛ Solution :-

Distance = 210m + 90m

= 300m

Time = 12 seconds

Speed = Distance / Time

= 300/12 sec

= 25 m/s

=> 25 × 3600/1000 km/h

=> 90 km/h