Present age of Bob is equal to Abby's age 8, years ago. Four years hence, respective ratio betwe

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7.Profit and Loss

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Present age of Bob is equal to Abby's age $8\, years$ ago. Four years hence, the respective ratio between Bob's age and Abby's age will be $4: 5$ at that time. What is Bob's present age? (in $years$)

A

$24$

B

$32$

C

$40$

D

$20$

Solution

$B+4=A-8+4$ $B+4=4 x$

$A-4=5 x$

From options $( 2)$

Standard 13

Quantitative Aptitude

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