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?
153 - (4.5)15 = ?
? - (4.5)X = 0
You can do the calculations.
To find the submarine's depth at the end of the rise, we need to add the rise in depth to the initial depth. The submarine initially was cruising at a depth of 153 m and it rose for 15 minutes at a rate of 4.5 m/min. Therefore, to find the submarine's depth at the end of the rise, we multiply the rate of rise (4.5 m/min) by the duration of the rise (15 min) and add the result to the initial depth.
Depth at the end of the rise = Initial Depth + (Rate of Rise * Duration of Rise)
Depth at the end of the rise = 153 m + (4.5 m/min * 15 min)
Depth at the end of the rise = 153 m + 67.5 m
Depth at the end of the rise = 220.5 m
Therefore, the submarine's depth at the end of the rise is 220.5 meters.
To find how much longer it will take for the submarine to reach the surface, we need to calculate the remaining distance to the surface and divide it by the rate of rise.
Remaining depth to reach the surface = Surface - Depth at the end of the rise
Remaining depth to reach the surface = 0 m - 220.5 m
Remaining depth to reach the surface = -220.5 m
Since the remaining depth is negative, it means the submarine has already reached the surface. The submarine has risen to the surface at the end of the 15-minute rise, so it will not take any longer to reach the surface.