A submarine was cruising at a depth of 153 m. It then rose at 4.5 m/min for 15 min.
What was the submarine's depth at the end of this rise?
If the submarine continues to rise at the same rate, how much longer will it take to reach the surface?
My calculations
-153+4.5*15
=-153+67.5
=-85.5 This is how I got the first part, and i don't know if i did it the right way. the 2nd part im stuck on. can someone please help me
15 * 4.5 = 67.5
153 - 67.5 = 85.5
I got the same answer for the first part.
85.5 / 4.5 = 19 minutes longer to reach the surface
To calculate the submarine's depth at the end of its rise, you correctly used the formula: current depth + (rate of rise * time). Let's go through the calculations:
- Initial depth: 153 m
- Rate of rise: 4.5 m/min
- Time: 15 min
Using the formula: 153 + (4.5 * 15)
= 153 + 67.5
= 220.5
Therefore, the submarine's depth at the end of its rise is 220.5 m.
Now, to find out how much longer it will take for the submarine to reach the surface, we need to determine the remaining distance from the current depth to the surface and divide it by the rate of rise.
Given that the submarine is currently at a depth of 220.5 m and the surface is at a depth of 0 m, the remaining distance is 220.5 m.
Using the formula: remaining distance / rate of rise
= 220.5 / 4.5
≈ 49
Therefore, it will take approximately 49 more minutes for the submarine to reach the surface if it continues to rise at the same rate of 4.5 m/min.
Please note that these calculations assume a constant rate of ascent and do not account for factors like changes in speed or depth.