Math Problem Statement

A 45 foot ladder is set against the side of a house so that it reaches up 27 feet. If Latanya grabs the ladder at its base and pulls it 3 feet farther from the house, how far up the side of the house will the ladder reach now? (The answer is not 24 ft.) Round to the nearest tenth of a foot.

Solution

This problem involves the Pythagorean theorem, as the ladder forms a right triangle with the house and the ground.

Step 1: Set up the original scenario

Let:

  • The height the ladder reaches up the side of the house = 2727 feet.
  • The length of the ladder = 4545 feet.
  • The distance of the ladder's base from the house = xx.

From the Pythagorean theorem: x2+272=452x^2 + 27^2 = 45^2

Step 2: Solve for xx

x2+729=2025x^2 + 729 = 2025 x2=2025729x^2 = 2025 - 729 x2=1296    x=1296=36feet.x^2 = 1296 \implies x = \sqrt{1296} = 36 \, \text{feet}.

So initially, the base of the ladder is 3636 feet from the house.

Step 3: Adjust the base distance

When Latanya pulls the base 3 feet farther from the house, the new distance of the base becomes: x=36+3=39feet.x' = 36 + 3 = 39 \, \text{feet}.

Step 4: Solve for the new height

Let the new height the ladder reaches be hh. Using the Pythagorean theorem again: 392+h2=45239^2 + h^2 = 45^2 1521+h2=20251521 + h^2 = 2025 h2=20251521h^2 = 2025 - 1521 h2=504    h=50422.5feet.h^2 = 504 \implies h = \sqrt{504} \approx 22.5 \, \text{feet}.

Final Answer:

The ladder will reach approximately 22.5 feet up the side of the house.


Follow-up:

Would you like me to explain further or verify these steps?

Related Questions:

  1. How would the height change if the base were pulled 5 feet farther instead of 3 feet?
  2. What is the angle of the ladder with the ground in the initial position?
  3. How does the height compare when using a shorter ladder, such as 30 feet?
  4. Can you calculate the area of the triangle formed by the ladder, the wall, and the ground?
  5. If the ladder's length changed to 50 feet, how would the height change?

Tip:

The Pythagorean theorem is a powerful tool for right triangles—always identify which sides correspond to aa, bb, and cc.

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Math Problem Analysis

Mathematical Concepts

Pythagorean Theorem
Right Triangles
Distance and Height Relationships

Formulas

a^2 + b^2 = c^2 (Pythagorean Theorem)

Theorems

Pythagorean Theorem

Suitable Grade Level

Grades 8-10