Construction Math Free Test

The formula for the perimeter of a rectangle is P = I +1 + w + w. Since the two lengths add up to 30, the two widths must add up to 20 to make the perimeter of 50. Since the two widths are the same they must each be 10 feet.

1. Calculate the effective length of rebar.
a. 30D indicates to multiply 30 x diameter of the rebar.
Convert the 3/4" fraction to a decimal.
3/4" = 0.75"
30 x 0.75 = 22.5"
b. Convert inches to feet. 22.5" / 12" = 1.875' (loss)
c. Subtract the loss from the length of the bar.
20' - 1.875' = 18.125'
2. Use the formula: Quantity x Length / Effective Length = # Rebars Needed
4 x 440' / 18.125' = 97.1 rebars (Round up to 98)

In order to find out how many hours she worked, divide the total amount paid by the hourly wage, 90/15 = 6; 6 hours.

Add up the various stages in order to figure out the total amount of time he must spend per tree;
20 min +120 min +40 min = 180 min or 3 hrs. It takes him 3 hours per tree and he has 6 trees to trim;
6 treesx 3 hrs/tree = 18 hrs total. He has 2 days to accomplish 18 hrs of work; 18 hrs/2 days = 9 hrs/day.

Translate_____ is 30% of $24.90 into an equation: y = 30 x $24.90. Solve: y = $7.47, which represents the 30% savings. In order to find the new price of the faucet, subtract the 30% savings, $7.47, from the original price, $24.90; $24.90-$7.47 = $17.43.

First convert yards to feet. Since there are 3 ft. in a yard, the customer wants to buy 6 ft of rope: 2 yds x 3 ft/yd = 6 ft. Multiply 6 ft by the cost of rope per foot to get the total price; 6 ft x $0.75/ft = $4.50.

The cost of a phone call is ten cents plus four cents multiplied by one less than the total number of minutes (the first minute costs ten cents, so it is not multiplied by four cents). This translates into 10 + 4(m -1); m -1 is in parentheses because it must be calculated before multiplying by four cents.

To find the total bill, add up the cost of the items for a total of $229.97, $12.56 +$141.08 + $76.33 = $229.97

Find out how many rooms Lacey can clean in one hour and add it together with how many rooms Maria can clean in one hour. The total time to clean is 1 hour = 60 minutes.

Lacey can clean 4.29 rooms, 6844 = 4.29.

Maria can clean 3.16 rooms, 684a = 3.16.

When you add their efforts together they can clean 7.45 rooms, but because it asks for complete rooms, you must round down to 7 rooms.

Find out what 3.5% of 224,500 is by multiplying the two numbers, remembering to divide the percentage by 100,224,500 x 3.7ioo = 7,857.50.

1. Convert the radius from inches to feet
The radius equals 6”
Divide 6 by 12 to get feet.
6/12 = 0.5 feet
2. Next, find the amount needed for 1 bollard in cubic feet
Use the formula for the Volume of a Cylinder (Pie x radius squared x height)
V = 3.14r² x H
V = 3.14 x .5’ x .5’ x 5 = 3.925 cf
Round up to 3.93 cf
3. Find the total amount needed for all 50 bollards.
Multiply the amount for 1 cubic foot by the quantity of bollards needed 3.39 x 50 = 196.5 cf

There are 3.8 L per 1 gallon. To figure out how many liters Teresa will need for her mix, convert gallons to liters by multiplying 13 gal x 3.8 L/gal = 49.4 L.

A = "j" x Hip & Valley Factor (10' x 1.50)
B = "n" x Hip & Valley Factor (10' x 1.50)
C = "x" x Hip & Valley Factor (10' x 1.50)
D = "y" x Hip & Valley Factor (10' x 1.50)
E = "q" x Hip & Valley Factor (10' x 1.50)
F = "h" x Hip & Valley Factor (10' x 1.50)
15 (A) + 15 (B) + 15 (C) + 15 (D) + 15 (E) + 15 (F) = 90'

To find out how much Martha Earns in an hour, divide the total money by the hours to find out "money per hour": $376.8/18 = $20.93.

There are 1,000 milliliters in 1 liter. To calculate how many liters 174 milliliters are, divide 174 by 1,000; 174 mL/1,000 mL/L= 0.174 L.