A submarine hovers at 300meters below sea level. If it descends 160 meters and then ascends 450 meters,what is its new position?

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Solution

position of submarine before descending = 300m below sea level

[NOTE: descend means falling]

so after descending 300m new position = 300 + 160 = 460 feet below sea level.
then after ascending(means rising ) 450m
new position=460-450
=10m below sea level

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