Question

a 100m long train, remaining at a speed of 48 km/hr passes a tunnel in 21 sec. let's calculate the length of the tunnel.

Answer 1

Answer:

Step-by-step explanation:

   T + B = 48× 5/18× 21

   100 + B = 40/3× 21

   100 + B = 280

   B = 280 - 100

   So it's length is

   B = 180.

Answer 2

Step-by-step explanation:

T + B = 48% 5/18x 21

100 + B = 40/3x 21

100 + B = 280

B = 280 - 100

So it's length is

B = 180.