Computations

• 33 gallons


  Two coats of paint are required for an elevated water pipe line 7 inches in diameter (outside diameter) and 2000 ft long. If a gallon of paint covers 200 sq. ft. on the first coat and 250 sq.ft. on the second coat, how many gallons are needed.
• One cubic yard can give you a volume equivalent to:

  0.7651 cu.m
• What is the corresponding effective rate of 18% compounded semi-quarterly?

  19.48%
• If the total working area of the plunger of a pump is 10 sq. inch., what is the total force in pounds of the plunger when pumping against 1.25 lbs. per inch?

  12.5lbs
• Find the 25th term of an arithmetic progression 5, 8, 11, 14, ..

  77
• What is the weight of a solid ball of brass 6 inches in diameter? SG = 8.4

  34.3 lbs
• What is the radius of the circle which area is equal to that of a rectangle whose sides are 26.9 in and 12.5 in respectively?

  10.34 in
• Find the diameter of a circle whose area is equal to the difference between the area of 8 inch circle and an area of a 4 inch circle

  6.93 in
• Find the present worth of future payment of 100,000 to be made in 10 years with an interest of 12% compounded quarterly.

  30,655.68
• A motorboat went 70 miles in 4 hours when travelling at full stream upstream on a river whose current flows at a rate of 6mph. How much can the boat travel in still water?

  21.5mph
• At what rate of interest compounded quarterly will an investment double in 4 years?

  15.51%
• What is the percent lime in a slurry, if 12 lb of lime are mixed in a 55-gal drum that contains 52 gal of water?

  4.5 %
• A well produces 365 gpm with a drawdown of 22.5 ft. What is the specific yield in gallons per minute per foot?

  36.5 gpm/ft
• The hypotenuse of a right triangle is 34cm. Find the length of the shorter leg if it is 14 cm shorter than the other leg.

  16
• In triangle ABC, A=45 degrees and C=70 degrees. Find the side opposite to A if line AB=40m

  30.10m
• A drop of falling water passes at point 300m from the ground at a speed of 20m/ sec. How high above ground will it be 3 seconds later?

  195.80 m
• If the grade of a sanitary sewer has a slope of 0.10% for 1,200 ft, what is the rise of the pipe?

  1.20 ft
• What is the Fahrenheit equivalent of 26.5 degree centigrade?

  79.7
• Find the distance from the point (5, -3) to the line 7x-4y-28=0

  2.36
• How many gallons of 6% sodium hypochlorite are needed to disinfect a 1.0ft diameter pipeline that is 752 ft. long. The required dosage is 25.0 mg/L

  1.84