#### Answer

Ans:
1. Ratio of Length of whale shark to length of blue whale
2.Ratio of Length of great white shark to length of whale shark

#### Work Step by Step

From the given image
Lets try for Ratio of
Length of whale shark to length of blue whale = $\frac{40}{80}$ = $\frac{1}{2}$
Length of great white shark to length of whale shark = $\frac{20}{40}$ = $\frac{1}{2}$