Man Wrinkle spent one third of his life as a boy one sixth as a youth one fourth as a man and 9 years as an old person How many years does he spend as an active man?

Answer 1

L=lifetime in years

9 Years as an old person= 1- (time not an old person)

As (1/3)L+(1/6)L+(1/4)L= (2/6)L+(1/6)L+(1/4)L= (time not as old person)

= (3/6)L + (1/4)L

= (1/2)L + (1/4)L

= (3/4)L=(time not as an old person)

Therefore time as an old person= 9 years

Time not as old person= (3/4)L

so (1/4)L is old person = 9 years.

so (4/4)L = Life time = 9 years x 4

Lifetime = 36 years

Time as man = 1/4 of lifetime

= 9 years

however does this mean you are old when you are 27?