A deep-sea diver notes that the gauge on his pressure suit reads 2.19×105Pa at one depth, where the absolute pressure is 3.20×105Pa. He then descends until the gauge reads 4.90×105Pa. Assuming seawater density 1.03×103kgm−3 and g=9.8ms−2, determine the additional depth through which he has descended.
(a) 49m
(b) 21m
(c) 27m
(d) 39m