The age of Rajeev is 1/6th of his mothers present age. Rajeevs mother age will be twice of his sister Kamalas age after 10 years. If Kamalas 8th birthday was celebrated two years before, then what is Rajeevs present age?
13.5
14.5
5
4
Explanation:
Let the present age of father be a
Present age of Rajeev= a/6
According to first condition,
( a + 10) = 2 ( Kamal's present age + 10)
=> (a + 10) /2 - 10 = Kamal's present age
=> Kamal's present age = ( a + 10 - 20) / 2
=> Kamal's present age = ( a - 10) /2
Now,
According to second condition,
( a - 10)/2 - 2 = 8
=> ( a - 10 - 4) / 2 = 8
=> a - 14 = 16
=> a = 30
Rajeev's present age = 30 /6 = 5 years
Let the present age of father be a
Present age of Rajeev= a/6
According to first condition,
( a + 10) = 2 ( Kamal's present age + 10)
=> (a + 10) /2 - 10 = Kamal's present age
=> Kamal's present age = ( a + 10 - 20) / 2
=> Kamal's present age = ( a - 10) /2
Now,
According to second condition,
( a - 10)/2 - 2 = 8
=> ( a - 10 - 4) / 2 = 8
=> a - 14 = 16
=> a = 30
Rajeev's present age = 30 /6 = 5 years