Answer:
60 x 130
Step-by-step explanation:
w
____
| |
w+70 | | w+70
| |
---------
w
add all the sides
2(w+70)+2w=380
2w+140+2w=380
4w+140=380
move the 140 to the other side of the =
4w=380-140
4w=240
divide both sides by 4
w=60
to get the length plug in 60 to w+70 to get 130 and width is just 60.
