GMAT Critical Reasoning (CR) | Re: Birds need so much food energy to maintain their body temper

Premise 1: Energy from one unit of seed (case 1) < Energy from one unit of nectar (case 2)
Premise 2: Total energy requirement is the same for both cases
Conclusion: Time required to acquire energy by eating seeds (case 1) > Time required to acquire same amount of energy by eating nectar (case 2)

What if the speed of eating seed > the speed of eating nectar - the time required for case 1 and case 2 could the be the same.

Thus
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