A brother is younger than his sister by 15 years and the sister was 50 years old 8 years ago What wi...........

Quantitative Aptitude (CDS) Problems based on Ages

A brother is younger than his sister by 15 years and the sister was 50 years old, 8 years ago. What will be the total age of the sister and brother after 18 years?

139 years

128 years

173 years

137 years

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Explanation:

Let the present age of sister be x years. Then the
the present age of brother= (x – 15) years.
According to question,
x – 8 = 50
= x = 50 + 8
= x = 58
Age of brother = 58-15
= 43 years
Age of brother after 18 years = 43 +18
= 61 years
Age of sister after 18 years = 58 + 18
= 76 years
Total age of both = 61 +76
= 137 years