Judith is digging for sandstone at a geological site. She has 160 meters of rope and 4 stakes to mark off a rectangular area. Which set of dimensions will create a rectangle using all the rope Judith has with her?

16 m × 10 m
80 m × 80 m
65 m × 10 m
70 m × 10 m

Question

Judith is digging for sandstone at a geological site. She has 160 meters of rope and 4 stakes to mark off a rectangular area. Which set of dimensions will create a rectangle using all the rope Judith has with her?

 16 m × 10 m
 80 m × 80 m
 65 m × 10 m
 70 m × 10 m

anonymous · Answer

@phi

phi · Answer

the perimeter (length of the rope when you "wrap" it around the stakes)
will be L+L+W+W  or 2L+2W  or 2(L+W)

I would add up the two dimensions (the L and W) of each choice, double it
and see if I get 160

anonymous · Answer

would it be the last answer choice? @phi

phi · Answer

yes, because 2(70+10) = 2*80= 160

anonymous · Answer

thank u!