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October 22, 2014

Posted by **joi** on Tuesday, December 27, 2011 at 11:22am.

4. Mr Lee is 38y old. His daughter is 32y younger.

a) In how many years time will Mr Lee be 3x as old as his daugheter?

b) When Mr Lee is 64y old, what will be the ratio of his age to his daughter's age?

- maths p5 -
**Henry**, Tuesday, December 27, 2011 at 5:44pm4a. Daughter = 38 - 32 = 6 years old

(38+X) / (6+X) = 3,

3x + 18 = X + 38,

3x - x = 38 - 18,

2x = 20,

X = 10 Years.

4b. His daughter is 32 yrs younger than

him:

Daughter = = 64 - 32 = 32 years old.

Ratio = 64/32 = 2/1.

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