Krishna and Karan are playing see-saw. Krishna's weight is 60 kg and Karan is 80kg. Who among the following kids can help Krishna balance the see-saw. (All of them can sit at extreme ends only).

Pappu - $21 kg$

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Puppy - $23 kg$

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Pandu - $20 kg$

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Mahi - $10 kg$

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Solution

The correct option is C
Pandu - $20 kg$

It is given that Krishna weighs $60 kg$ and Karan weighs $80 kg$ .

Let the weight required to balace the see saw be $x$ kg
$\Rightarrow 60 + x = 80$
$\Rightarrow x = 80 - 60$
$\Rightarrow x = 20$

So, Krishna should take help of a kid who weighs exactly $20 kg$ to balance the see saw.
Thus, Pandu would be the correct selection.

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