Sunday

February 1, 2015

February 1, 2015

Posted by **stephanie** on Wednesday, September 28, 2011 at 7:16pm.

- math -
**Steve**, Thursday, September 29, 2011 at 12:19amUse your good old Pythagorean theorem:

H = 20

L = D+4

L^2 = H^2 + D^2

(D+4)^2 = 20^2 + D^2

D^2 + 8D + 16 = 400 + D^2

8D = 384

D = 48

L = 52 ft

**Answer this Question**

**Related Questions**

algebra - A ladder is resting against a wall. The top of the ladder touches the ...

math- solving quadratic equations by factoring - a ladder is resting against a ...

Algebra 1 - A ladder is resting against a wall. The top of the ladder touches ...

algebra 2 - a ladder is resting against a wall. the top of the ladder touches ...

maths - A ladder lies against a wall.the top of the ladder reaches 8feet above ...

MAth - A 13 foot ladder is resting against the wall. The bottom is initially 10 ...

Calculus - A fence 5 feet tall runs parallel to a tall building at a distance of...

Calculus - Suppose a ladder of length 36 feet rests against a wall, and we pull ...

Math - A ladder is placed against a wall, with its base 2 m from the wall. The ...

phsics - uniform ladder 25 ft long rests against a smooth vertical wall. The ...