uan his son. In 12 years, the man will be three tirmes as old as hisIL

1.	uan his son. In 12 years, the man will be three tirmes as old as hisIL D their present agesbe o7 nas and Mangl are in the rato 7:5. Ten years tience the ratio df their agsr present ages. Flve years ago a man was seven times as old as his et Fthree times as old as his son. Find ti
Answer» Let the current age of sonal be x and manoj be y x/y = 7/5 => x= 7y/5 after 10 years => (x+10)/(y+10) = 9/7 => 7(x+10) = 9(y+10)=> 7x-9y = 90-70=20 putting x = 7y/5 in the equation => 7(7y/5) -9y = 20=> (49-45)y = 205 = 100=> 4y = 100=> y = 100/4 = 25 years and hence x = 725/5 = 35 years present age of sonal be = 35 yearspresent age of manoj be = 20 years

uan his son. In 12 years, the man will be three tirmes as old as hisIL D their present agesbe o7 nas and Mangl are in the rato 7:5. Ten years tience the ratio df their agsr present ages. Flve years ago a man was seven times as old as his et Fthree times as old as his son. Find ti

Answer»

Let the current age of sonal be x and manoj be y

x/y = 7/5 => x= 7y/5

after 10 years => (x+10)/(y+10) = 9/7

=> 7(x+10) = 9(y+10)=> 7x-9y = 90-70=20

putting x = 7y/5 in the equation

=> 7(7y/5) -9y = 20=> (49-45)y = 20*5 = 100=> 4y = 100=> y = 100/4 = 25 years

and hence x = 7*25/5 = 35 years

present age of sonal be = 35 yearspresent age of manoj be = 20 years