A Lot Is in the Shape of a Right Triangle $60 \mathrm{~m}$

Multiple Choice

A lot is in the shape of a right triangle. The shorter leg measures $60 \mathrm{~m}$ . The hypotenuse is $20 \mathrm{~m}$ longer than the length of the longer leg. How long is the longer leg?

A) $120 \mathrm{~m}$
B) $100 \mathrm{~m}$
C) $60 \mathrm{~m}$
D) $80 \mathrm{~m}$