Total time = 10/10
So time left = 10/10 - 2/10 - 7/10
= 10/10 - 9/10
= 1/10 (answer)
3+2+8
Two other ways:
10+3
And
11+2
If the math adds up the submarine will travel .6 km in .25 hours.
10/4, 4:10 and, 10 to 4.
If that helps make sure to 5 star and brainliest! <3
-Procklownyt