x=7
Pretty Simple.. h h h
45% × ? = 17.1
17.1 ÷ 45% =
17.1 ÷ (45 ÷ 100) =
(100 × 17.1) ÷ 45 =
1,710 ÷ 45 =
38;
so 45% of 38 = 17.1
Because you know the area and that the shape is a square... if the side length is "s"... to find "s" you would say...
s²=1.69
Take the root of both sides and...
s=1.3 km
