Question
The age ratio of Kiran and Meena 3 years ago was 3:4. In 9
years from now, the ratio of their ages will be 5:6. What is the present age of Meena?Solution
ATQ,
Let the ages of Kiran and Meena 3 years ago be '3x' and '4x' respectively.
So, Kiran’s age after 9 years = 3x + 3 + 9 = (3x + 12) years
And Meena’s age after 9 years = 4x + 3 + 9 = (4x + 12) years
ATQ,
(3x + 12)/(4x + 12) = 5/6
⇒ 6(3x + 12) = 5(4x + 12)
⇒ 18x + 72 = 20x + 60
⇒ 12 = 2x
⇒ x = 6
So, present age of Meena = 4 × 6 + 3 = 27 years
Evaluate:
√729 + √49 - √16 + 1/√64
Simplify:

(1/5)(40% of 800 – 120) = ? × 5
2/5 of 3/4 of 7/9 of 7200 = ?
`sqrt(5476)` + 40% of 1640 = ? `xx` 4 - 2020
? = (22% of 25% of 60% of 3000) + 21
Determine the simplified value of the given mathematical expression.
(342 – 20% of 5280) = ? ÷ 3
∛157464 =?