Question 193261
c.  60

might  start  by  drawing  a  line  ,  and  marking  off  3  sections.
the  second  seems  to  be  base,  so  set  it  equal  to  x
the  first  piece  is  twice  as  long,  or  2x.
the  third  is  three  times  as  long  or  3x.

Total  length  is  120,  therefore
2x+x+3x=120
6x=120
x=20

returning  to  the  sketch,  we  have  2x=40,,x=20,,,3x=60  (or  longest)

check  sum  =120  ok