The distance of a planet from the Sun is at perihelion and at aphelion

PHYSICS · Subjective · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

The distance of a planet from the Sun is

0.40\,\text{AU}

at perihelion and

1.60\,\text{AU}

at aphelion. Find the ratio of its speed at perihelion to its speed at aphelion.