On a Sunny Day, a Tree and Its Shadow Form $35 \mathrm{~m}$

Multiple Choice

On a sunny day, a tree and its shadow form the sides of a right triangle. If the hypotenuse is $35 \mathrm{~m}$ long and the tree is $28 \mathrm{~m}$ tall, how long is the shadow?

A) $45 \mathrm{~m}$
B) $21 \mathrm{~m}$
C) $63 \mathrm{~m}$
D) $49 \mathrm{~m}$