Problem 1:A swimming pool can be filled by a large pump in 3 hours and by a small pump in 6 hours, each pump working on its own. At 9 am large pump is started. At what time will the swimming pool be filled if small pump is started at 9:30 am?
Problem 2:
It takes 2 hours for Tim to mow the lawn. Linda can mow the same lawn in 3 hours. John can mow it in 5 hours. John starts mowing at 9 am, and is joined by Linda at 10 am and Tim at 11 am. At what time will they finish mowing the lawn?
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Problems from 05/25/17
Problem 1:In American football the standard field dimensions are 120 yards long and 53 1/3 yards wide. What are the measures of angles angles at the point where the diagonals intersect.
Problem 2:
Two gears are interconnected. The smaller gear has a radius of 4 inches, and the larger gear has a radius of 6 inches. The smaller gear rotates 90 degrees in 4 seconds. What is the angular speed, in degrees per seconds, of the larger gear?
Congratulations to Ramachandran Balakrishna and Kishore Balsara, who were the winners of the last set of puzzles.
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