Can anyone help me please?

The scale on a map reads 4 cm = 30 miles. If the actual distance between two cities is 120 miles, what is the distance on the map?


A) 8 cm





B) 16 cm





C) 12 cm





D) 24 cm

Can anyone help me please?
The answer is B





4/30 = x/120





30x=480





480/30=16





x=16
Reply:4 cm=30 miles





120 miles = x





4/x=30/120


30x=480


30x=30=480/30


x=16 cm
Reply:Eh. you should be asking why the answer is what it is. B is the right answer, but because you have to cross multiply using a proportion. 4 = 30, 8 = 60, 16 = 120. Just doubled the values twice, or u can put then into a proportion/cross multiply...
Reply:16 cm. 120/30 = 4, 4 x 4 = 16
Reply:B
Reply:The answer is B.


Think about it: 4 cm = 30 miles.


Therefore 8 cm = 60 miles.


12 cm = 90 miles


16 cm = 120 miles


See? What grade are you in? You should have been able to figure that out. That is 2nd grade work.
Reply:The answer is 16 cm. 120m is four times thirty, so four times 4cm is 16.