Submarine 1 : at 4,863 feet and is ascending 81.1 feet per minute
Submarine 2: at 3,645 feet and is ascending 76.9 feet per minute
so, step 1:
The third statement is the true
Step 2:
For the same depth
-4,863 + 81.1 m = -3,645 + 76.9 m
solve to find m
so,
81.1 m - 76.9 m = 4863 - 3645
4.2 m = 1,218
m = 1,218/4.2 = 290 minutes
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