Posted by **fred** on Friday, March 13, 2009 at 6:07pm.

a man is 6ft tall and he casts a shadow of 5 ft, if a tree casts a 30ft shadow, how tall is the tree?

- math -
**Ms. Sue**, Friday, March 13, 2009 at 6:09pm
Cross multiply this ratio and solve for x.

5/6 = 30/x

- math -
**fred**, Friday, March 13, 2009 at 6:13pm
Ms Sue I'm still stuck

- math -
**bob**, Friday, March 13, 2009 at 6:20pm
5/6=30/x

You can see that 5 was multiplied by 6 to get 30. In order to keep the fraction the same, you'll also have to multiply the 6 in the denominator by 6 to get 36 as your value for x, which in this case represents the height of the tree in feet.

- math -
**Ms. Sue**, Friday, March 13, 2009 at 6:27pm
When you cross multiply, you multiply the two farthest terms for the numerator and the two closest terms for the denominator.

5/6 = 30/x

5x = 6 * 30

5x = 180

x = ?

- math -
**fred**, Friday, March 13, 2009 at 6:31pm
X=36

- math -
**Ms. Sue**, Friday, March 13, 2009 at 6:38pm
Right. The tree is 36 feet tall.

## Answer This Question

## Related Questions

- math - A tree casts a shadow 10 ft long. A boy standing next to the tree casts a...
- Math - Stanely is 6ft tall. He wants to stand in the shade of a tree that is ...
- math 115 CH 7 - A tree casts a shadow that measures 5 m. At the same time, a ...
- Math 115 - A tree casts a shadow that measures 5 m. At the same time, a meter ...
- Math - A tree casts a shadow that measures 5m. At the same time, a meter stick ...
- geomary - in sunlight, a vertical stick 7 ft tall casts a shadow 3 ft long. At ...
- Geometry - mary is 5ft 9 inches tall. she casts a 2 ft shadow. the tree casts a...
- math - A tree casts a shadow that measures 5 m. At the same time, a meter stick ...
- Math - A tree casts a shadow that measures 5 m. At the same time, a meter stick ...
- Math - A tree casts a shadow that measures 5m. At the same time,a meter stick ...

More Related Questions