Challenger App

No.1 PSC Learning App

1M+ Downloads
A father is 25 years older then his son. Ten years ago father’s age was 6 times of his son’s age. What is the present age of son?

A10

B15

C30

D40

Answer:

B. 15

Read Explanation:

let the present age of son be ' x ' and age of his father be ' y' y = x + 25 10 years ago , age of father = y - 10 and age of his son be = x - 10 ( y - 10 ) = 6 (x - 10 ) x + 25 - 10 = 6x - 60 x + 15 = 6x - 60 5x = 75 x = 15 yr


Related Questions:

One card is drawn from a pack of 52 cards. The probability that the card drawn is either a ten number or a king?

$$താഴെ തന്നിരിക്കുന്നവയിൽ ഗുണനഫലം എണ്ണൽ സംഖ്യകൾ വരുന്ന ജോടികൾ ഏവ?

$1) \sqrt {0.8},\sqrt {20}$ 

$2)\sqrt {0.8},\sqrt {0.2}$ 

$3)\sqrt {30},\sqrt {1.2}$ 

$4)\sqrt {0.08},\sqrt {0.02}$

4 years ago Ramu's age is the square root of his father's age. Now the age of Ramu and his father are in the ratio 1:4.Then what is Ramu's age?
A ഒരു ജോലി 15 ദിവസം കൊണ്ടും B അതേ ജോലി 12 ദിവസം കൊണ്ടും C അത് 20 ദിവസം കൊണ്ടും തീർക്കും എങ്കിൽ A യും B യും C യും ചേർന്ന് എത്ര ദിവസം കൊണ്ട് ജോലി തീർക്കും ?
The length of the diagonal of a square is 20 cm then its perimetre ?