Posted by **Adam** on Friday, August 15, 2014 at 8:52am.

Al is twice as old as Bill, who is twice as old as Carl. In 10 years, Al will be twice as old as Carl. How old is Al now?

A. 40

B. 20

C. 10

D. 5

- math -
**Reiny**, Friday, August 15, 2014 at 8:58am
I usually start with the smallest quantity, which here is Carl's age

let Carl's age be x

then Bill is 2x

and Al is 4x

in 10 years:

Carl --- x+10

Bill --- 2x+10

Al ---- 4x + 10

so 4x+10 = 2(x+10)

4x + 10 = 2x + 20

2x = 10

x = 5

So now Al is 4(5) = 20

check:

present ages:

Carl -- 5

Bill --- 10

Al ---- 20

10 years from now:

Al will be 30 and Carl will be 15

Is Al twice as old as Carl ?? YES

- math -
**Adam**, Friday, August 15, 2014 at 9:05am
thanks

## Answer This Question

## Related Questions

- Math - 2x represents that Clyde is twice (2 times) as old as Bonnie. 6 years ...
- math - i never can do word problems....please help... i got 7 of them.....these ...
- math - A. Brad is 12 years older than Sam . If Brad were 8 years older than he ...
- math - Jack is twice as old as he was 5 years ago. His mother was then six times...
- 9th grade math word problems - i never can do word problems....please help... i ...
- Math - I don't get page 50 of algebra with pizzazz! Please help? 7) Kathy is 6 ...
- math - L is 3 times as old as D, who is five yrs older than C. If in 18 years L ...
- Math - Six years ago, Jim was four times as old as Fe. In four years, he would ...
- math - six years ago, jim was four times as old as Fe. In four years, he would ...
- math word - beth is two years older than julio. gerald is twice as old as beth. ...

More Related Questions