Question

After 7 years Sarosh's father age will be 3 times that of Sarosh's present age then, which will also be equal to 6 times Sarosh's present age. Sum of their present ages is equal to:

• A. 42
• B. 40
• C. 35
• D. 28

Answer 1

The correct option is A 42

Let Sarosh's present age be $x$.
After 7 years Sarosh's age will be $x+7$
and, his father's age will be $3(x+7)$.
This is equal to 6 times Sarosh's present age, i.e. $=6x$
So,
$6x=3(x+7)=3x+21$
$6x-3x=21$
$3x=21$
$x=7$
Sarosh's present age is 7 years.

Father's age after 7 years is,
$6\times 7=42years$
His present age is,
$42-7=35years$

$\text{Sum of their present ages = 35 + 7 = 42}$