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.

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