Question 983919
An aircraft carrier left Diego Garcia and traveled toward St. Vincent at an average speed of 12 km/h.

Let the time taken to meet be x

distance travelled = 12x


 A container ship left one hour later and traveled in the same direction but with an average speed of 15 km/h.

one hour later
time = (x-1) hours

distance travelled = 15(x-1)

distance travelled by both when they meet is same

15(x-1) = 12x

15x-12x = 15

3x= 15
x= 5