A) 104 kg
B) 65kg
C) 13kg
D) 39kg
Correct Answer: A
Solution :
Total mass of 3 children = 117 kg A's mass \[=\text{5 }\times \text{ C }\!\!'\!\!\text{ s}\] mass \[\therefore \] A = 5C B's mass \[=\text{3 }\times \text{ C }\!\!'\!\!\text{ s}\] mass B = 3C A + B + C = 117 kg \[\therefore \] 5C + 3C + C = 117 kg 9C = 117 kg C = 13 kg \[\therefore \] Total mass of A and \[\text{B}=\text{5C}+\text{3C}=\text{8C}\] \[=\text{8 }\times \text{ 13 kg }=\text{1}0\text{4 kg}\]
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