Answer:
REENA IS STRONGER
Step-by-step explanation:
so let's just find how long each person takes to carry the load half way, to proof who is stronger.
Rahul takes 5 minutes
5/2
= 2.5
so Rahul takes 2.5 minutes to travel 100 metres with 80 kg
where as
Reena take 4 minutes
4/2
= 2
so Reena takes 2 minutes to travel 100 metres with 80 kg
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Therefore Reena is stronger because, she went 30 seconds before Rahul