Question

a fast moving train is 9/10 kilometre away from the tunnel if it covers
1/10 kilometre in each second how many seconds will it take to enter the tunnel​

Answer 1

Step-by-step explanation:

time taken will be =9/10÷1/10

=9/10×10/1

=9 seconds

Answer 2

Answer:

Train will  take 9 seconds to enter the tunnel​

Step-by-step explanation:

fast moving train is 9/10 kilometer away from the tunnel

Distance to be covered to enter the tunnel​ = 9/10 km

Train covers 1/10 kilometer in each second

Speed = Distance / Time

=> Speed of train = (1/10)/1  =  1/10  km/sec

Distance to be covered = 9/10 km

Time to be taken to enter the tunnel =  (9/10)/(1/10)  = 9 sec

Train will  take 9 seconds to enter the tunnel​