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Based on the statement, determine how much water an average household uses each month. Assume that there are 300 million households in Country A.
A pump discharges a liquid into a drum aat the rate of 0.032 m3/s. the drum,1.5 m in dia and 4.2m in length, can hold 3000 kg of the liquid. Find the density of the liquid and mass flow rate of the
The standard deviations are 8 & 7. Obtain the mean and standard deviation of the sample of size 150 obtained by combining the two samples.
The mean weight of Chas, Dave and Ed is 77 kg. Chas and Ed weigh the same. Arnie weighs 75 kg. Find the weights of the other four people.
70 students are required to paint a picture. 52 use green color and some children use red, 38 students use both the colors. How many students use red color?
Graham walked to school at an average speed of 3 miles an hour and jogged back along the same route at 5 miles an hour. If his total travelling time was 1 hour, what was the total number of miles
Kerry has 12 paperweights in her collection. She has twice as many glass paperweights as metal, and 3 are wood. How many of each type of paperweight does she have?
If the speed on the current was 12 mph and the total trip took 3 hours and 40 minutes, find the average speed of the boat relative to the water. The boat had an average speed of __?
A vacuum cleaner motor can be viewed as an inductor with an inductance of 200 mH. For a 60-Hz AC voltage, Vrms = 120 V,what capacitance must be in series with the motor to maximize the power output
Describe the motion of a ball as it rolls up a slanted driveway the ball starts at 2.5m/s slows down for 5.0s stops for an instant and rolls back down at an increasing speed.
A beam of light in air is incident on the surface of a slab of fused quartz. Part of the beam is transmitted into the quartz at an angle of refraction of 28degrees relative to a normal to the surfa
What is the force per meter on a straight wire carrying 5.0 S when it is placed in a magnetic field of .020 T? Whe wire makes an angle of 27° with respect to the magnetic field lines.
A medical researcher has 40% and 5% solutions. How much of each solution must she mix to get 0.6 liter of a 20% solution?
The angular velocity of a flywheel obeys the equation wz(t) = A + Bt^2, where t is in seconds and A and B are constants having numerical values 2.15 (for A) and 1.30 (for B). What is the angular ac
How much of a 50% acid solution should be added to 40 gallons of a 25% acid solution to make a mixture that is 30% acid?
A shopkeeper buys some books for Rs-80. If he had bought 4 more books for the same amount, each book would have cost Rs-1 less. Find the number of books he bought.
A flexible chain of weight w hangs between 2 points A and B at the same level. the inclination of chain with horizontal at two points of support is theeta. what is tension in chain at mid poi
The ladder is 9 ft from the side of the building. If the ladder barely touches the top of the building, estimate the top of the building.
A ferris wheel has a radius of 10cm and the bottom of the wheel passes 1m above the ground. If he ferris wheel makes one complete revolution every 20s, find an equation that gives the height above t
For a sailboat to reach a destination directly upwind, it is necessary to tack left and right to the direction of the wind. Suppose we decided to tack at 45 degree angles to the wind. If our present
The scale of a model car is 1 inch = 2.5 feet. The length of the model car is 6 inches. The width of the model car is 2.3 inches. Set up a proportion to find the actual length of the car.
Dae opens a credit card with an APR of 19.49% compounded monthly. How much is charged in interest this month if her balance is $1250?
In triangle ABC, if the lengths of 2 sides are 25 & 50, the angle between these two sides is 30 degrees, what is the length of the third side of the triangle? Round off to the nearest whole numb
The angles of elevation of a balloon from two points A and B on level ground are 24.17 degrees and 47.67 degrees respectively. Points A and B are 8.4 miles apart, and the balloon is between the poin
The price of a garment is reduced by 20% and further by 10%. Nidhi got another 5% discount for detecting a defective button. The total discount for the garment is?