Billy worked for three straight hours on his homework questions. If he solved 132 questions in the third hour, which was twice as many as he solved in the second hour, and three times as many questions as he solved in the first hour, how many questions did he solve total?
Answer(s): A
132 / 2 are 66 questions in the second hour, 132 / 3 are 44 questions in the third hour. 132 + 66 + 44 = 242 questions.
V is the volume of a cylinder; the radius of the cylinder is 3.4. The height of the cylinder is 550% more than the radius. Which of the following is true?
Answer(s): D
You can start with the length. Length = 6.5 x 3.4 is approximately 22. The Volume of the cylinder is the area of its face x its length.Area of face = .V is approximately 36 x 22 = 792 and the best answer is D.
Two trains are traveling on a collision course. If train A is traveling at a speed of 350 mph and train B is traveling 28% slower, how much time will it take the trains to collide if the initial distance between the two is 1505 miles?
Train B is traveling at a speed of 0.72 x 350 = 252 mph.The two trains are traveling in opposite directions. Thus, the distance should be divided by the sum of their speeds = 252 + 350 = 602 mph.1505 miles / 602 = 2.5 = two hours and 30 minutes.
Two cars are traveling towards each other. If car A is traveling at a speed of 50 mph and car B is traveling 12% slower, how much time will it take the cars to meet if the initial distance between the two is 705 miles?
Answer(s): B
Car B is traveling at a speed of 0.82 x 50 = 44 mph.The cars are traveling in opposite directions. Thus, the distance should be divided by the sum of their speeds = 50 + 44 = 94 mph.705 miles / 94 = 7.5 = seven hours and 30 minutes.
Tom and Jerry are running on the same road towards each other. If Tom is running at a speed of 2.5 meters per second and Jerry is running 36% slower, how much time will it take them to meet if the initial distance between the two is 50 meters and Tom started running 20 seconds before Jerry did?
Jerry is running at a speed of 0.64 x 2.5 = 1.6 meters per second.Tom runs alone a distance of 2.5 x 20 = 50 meters. Tom caught Jerry off-guard and Jerry didn’t even start running.
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