Question

The weight of a mother and her child together is 70 kg. The weight of the father and the child together is 90 kg. The weight of the father and the mother together is 120 kg. What is the combined weight of the family?
(A) 100 kg
(B) 150 kg
(C) 140 kg
(D) 200 kg

Answer 1

Answer:

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Step-by-step explanation:

here is your answer

Answer 2

Answer:

140 kg

Step-by-step explanation:

weight of mother = m

weight of father = f

weight of child = c

m + f + c = ?

Given:

m + c = 70

f + c = 90

f + m = 120

Add all three equations..

2(m + f + c) = 280

m + f + c = 140 kg