Question

A flat, rectangular flower bed with an area of 2,400 square feet is bordered by a
fence on three sides and by a walkway on the fourth side. If the entire length
of the fence is 140 feet, which of the following could be the length, in feet, of
one of the sides of the flower bed?
Indicate all such lengths and should indicate why the remaining choices are not correct.

A) 20
B) 30
C) 40
D) 50
E) 60
F) 70
G) 80
H) 90

Answer it with a proper proof (may be a paper on which you've calculated it or may be an equation in your comment). ​

Answer 1

Answer:

60 is answer but I think.sorry I don't know this answer because I'm low class pzz understand me sorry