Answer:
2√6
Step-by-step explanation:
I will be honest with you and say that I'm not sure if it is right or not.
a(20ft)
b(46ft)
c(72.6mm)
C: 3 x 4 x 4
It's obvious for an European since it's simple approximation, the cm is just thrown in to confuse Americans.
After 23 years
hope this is helpful!