The fraction 5/8 is located between what two fractions? A. 1/4 and 2/5
B. 8/9 and 3/5
C. 1/2 and 2/3
D. 3/7 and 10/16

C is the answer I pretty sure of it

Let's say the width is equal to x

We can then say that the length is 2x

We need to add together 2 of both sides;
2x+2x+x+x = 6x

Then we can divide 420 by 6 to get the width:
420/6 = 70ft

Then double it to get the length:
70*2 = 140ft

width = 70ft
length = 140ft
Hope this helps! :)