Question

A submarine can descend from the water surface at the rate of 12 m per minute after descending for 20 minute it again rises by 30 meters what is its new plsition​

Answer 1

Rate of descending=12 m/min

It descended for 20min so total depth acquired=20x12=240m

Again it raises 30m,so

final position=240-30=210m below water surface level.