How many fifths are equivalent to 12/20

3

Step-by-step explanation:

1. Since and then

2. Note that

Then 3 fifths are equivalent to

Another way of solving this problem is in representing one fifth as a fraction with denominator 20:

Since you can state that 3 fifths are equivalent to

The lateral area would be the total surface area, minus the top and bottom. In this case, only the bottom will be excluded

Area = 1/2bh x 2 (there are two sides)
Area = 1/2(5x5)(2)
Area = 25m^2

Area = LW x 2 (the longer sides)
Area = 14(5)(2)
Area = 140m^2

Add them together

165m^2 = lateral area

Add the lateral area with the base surface area to get the total surface area

Area = LW
Area = 14(5)
Area = 70m^2

Surface area = 70 + 165
Surface area = 235m^2

Hope this helps :)