16) D
Volume = Area x Depth
Depth = Volume / Area
Firstly, use approximate values. Using the exact values given in the table will waste time during calculations.
A – Wrong
80,000 / 400,000 = 1 / 5 = 0.2 km
B – Wrong
28,000 / 70,000 = 4 / 10 = 0.4 km
C – Wrong
19,000 / 32,000 = 0.59 km
D – Correct
24,000 / 32,000 = 3 / 4 = 0.75 km
E – Wrong
300 / 24,000 = 1 / 80 = 0.0125 km
Baikal clearly has the greatest average depth.