The diameter of circle a is 4cm, the radius of circle B is 6cm, and the area ratio of circle a and circle B is () A 4mm precision instrument parts, drawing on the map has 4cm, the scale is () The () and () of a circle are in direct proportion How many times does it take to transport 2700 tons X is proportional to y () 1. X + y = 30 2. Y = 2 / 3 x 3. Xy = 2 / 3

The diameter of circle a is 4cm, the radius of circle B is 6cm, and the area ratio of circle a and circle B is () A 4mm precision instrument parts, drawing on the map has 4cm, the scale is () The () and () of a circle are in direct proportion How many times does it take to transport 2700 tons X is proportional to y () 1. X + y = 30 2. Y = 2 / 3 x 3. Xy = 2 / 3

The diameter of circle a is 4cm, the radius of circle B is 6cm, and the area ratio of circle a and circle B is (1:9)
A 4mm precision instrument part, 4cm on the drawing, the scale is (10:1)
The circumference and radius of a circle are in direct proportion
How many times does it take to transport 2700 tons
Set X times
X:2700=5:600
X is proportional to y (2. Y = 2x / 3)