In a film, actor charles coburn plays an elderly "uncle" character criticized for marrying a woman when he is 3 times her age. he wittily replies, "ah, but in 30 years time i shall only be twice her age." using algebra as opposed to "trial & error", how old is the "uncle" and the woman?

each answer must be explained in detail using the correct vocabulary to receive full credit.

Age of uncle = 90 years

Age of woman = 30 years

Step-by-step explanation:

Let the age of uncle be x years

And age of woman be y years

Now, uncle is three times her age ⇒ x = 3y (1)

Also, in 30 years uncle is twice her age ⇒ x + 30 = 2(y + 30) (2)

Now, substituting x = 3y from equation (1) in equation (2)

⇒ 3y + 30 = 2y + 60

⇒ y = 30

So, x = 90

Hence, Age of uncle = 90 years

Age of woman = 30 years

62.5 paisa

step-by-step explanation:

4000*70 = 280000

280000-(2000*90) = 100000

4000-2400 = 1600

100000/1600 = 62.5

( give brainliest)

no not all of them.

step-by-step explanation:

some of them have a square base.