There are white, blue, and red boats in a marina. Five-sixths of the boat in the marina are white,2/5 of the remaining boats are blue, and the rest are red. If there are 12 red boats, how many boats are in the marina

120 boats

Step-by-step explanation:

The number of boats is a multiple of 5 and also a multiple of 6 so it is a multiple of 5x6=30. Is 30 the answer? One sixth of 30 is 5 and three fifths of 5 is 3 so this would give 3 red boats. But there are 12 red boats so the number of boats must be 4 times 30 or 120. Check that 120 is correct. One sixth of 120 is 20 and three fifths of 20 is 12 so 120 is the correct answer.

area = length x width

length = 2 x width

32 = 2 x width x width

32 = 2 x width^2

36 = width ^2  

width = 6

length = 12

area is 32

perimeter = 2 x 12 + 2 x 6 = 24 + 12 = 36

step-by-step explanation: