The current age of Mark's father is three times that of Mark's age.
The current age of Mark's father is three times that of Mark's age. After five years the sum of their ages will be 90 years. What are their current ages?
A15, 45
B 20, 60
C25, 75
D
10, 30
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Answer is : 20, 60
Explanation:
Mark's age will be => x
Mark's father age will be => 3x
Now 5+ Father 3x 3x+5 Mark x x+5 After five year sum of their age will be
3x+5 + x+5 = 90
4x+10 = 90
4x = 80
x = 20
therefore mark's age = x = 20
mark's father age = 3x = 3 * 20 = 60
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