Answer:
14feet
Explanation:
The length of the longest flagpole is the length of diagonal r
Get s first using the pythagoras theorem;
s^2 = 14^2 - 3^2
s^2 = 196 - 9
s^2 = 187
s = √187
s = 13.67
Similarly
s^2 + 3^2 = r^2
Since s^2 = 187
187 + 9 = r^2
r^2 = 196
r = √196
r = 14ft
Hence the longest flagpole (in whole feet) that could be shipped in a box that measures 3 ft by 3 ft by 14 ft is 14feet