Question

Four years ago the ratio of age of suresh to deena is 5:3.The ratio of their present age is 11:7. What will deena's age 3 year hence

Answer 1

Answer:

if you multiply 11/7 by (4/4) you will get 44/28. this confirms that the ratio of 44/28 is equivalent to 11/7. your answer is good. deena'a age in 3 years will be 31 because 28 + 3 = 31.

Answer 2

Let the ages of Suresh and Deena four years ago be 5x and 3xyears

respectively...

$\frac{5x + 4}{3x + 4} = \frac{11}{7}$

$35x+28 = 33x + 44$

$⇒35x - 33x=44-28$

$⇒ 2x = 16 = 8$

Deena's age 3 years hence = 3x + 7

$= 3 \times 8+7= 31 years$

#SP J2