Question

a 40. Sum of the ages of a father and the son is 40 years. If father's age is three times that of his son, then what is father age ? (a) 22 years (b) 28 years (c) 30 years (d) 24 years​

Answer 1

Answer:

Step-by-step explanation:

eqn1  x+y=40

eqn2  y=3x

substituting 2 in 1

x+3x=40

4x=40

x=10

therefore sons age is 10 yrs.

now,

fathers age is y=40-x

y=40-10

y=30

therefore fathers age is 30yrs

correct answer is c

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