Question

Jack finished his race in 45 seconds. John finished 15 seconds earlier. How did long John take. ​

Answer 1

Answer:

30 secs

as

time taken by jack=45 secs

time taken by john=15 earlier than jack

i.e.

time taken by john = 45-15

                                =30 secs

Answer 2

Answer:

time taken by Jack = 45 seconds

time taken by John = x

x = 45 - 15

x = 30 seconds

so, John finished the race in 30 seconds