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2015 AMC 10A Problem 11

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2015 AMC 10A Problem 11AMC 10 Step by Step

Name: Date: September 13, 2026

Triangles: Area & Pythagorean · difficulty 2 of 5 · about 2 min · position P11-15

The ratio of the length to the width of a rectangle is $4$ : $3$ . If the rectangle has diagonal of length $d$ , then the area may be expressed as $kd^2$ for some constant $k$ . What is $k$ ?

A)
$\frac{2}{7}$
B)
$\frac{3}{7}$
C)
$\frac{12}{25}$
D)
$\frac{16}{25}$
E)
$\frac{3}{4}$

2015 AMC 10A Problem 11

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