a) 17 kg
b) 20 kg
c) 26 kg
d) 31 kg
Answer: d
Explanation: Let A, B, C represent their respective weights.
A + B + C = (45 x 3) = 135 …. (i)
A + B = (40 x 2) = 80 …. (ii)
B + C = (43 x 2) = 86 ….(iii)
Adding (ii) and (iii), we get: A + 2B + C = 166 …. (iv)
Subtracting (i) from (iv), we get : B = 31
B’s weight = 31 kg.
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