Problem 1:
Mr. Smith is on a road trip to a remote golf course 100 miles away. He travels part of the way at 60 miles/h along the highway, and part of the way at 20 miles/h along dirt roads. If it took 3 hours to get there, how much time did he spend on dirt roads?
Problem 2:
A car travels between two cities in 3 hours and 20 minutes. If it increase speed by 10 miles/hour it covers the same distance in 2 hours 30 minutes. How far are the cities?
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Problems from 12/06/18
Problem 1:Honza is 13 years old and Peter 21 years old. After how many years are their ages will be at ratio 7: 9?
Problem 2:
A man divides $10,000 into two investments, one returns 5% and the
other at 8% per year. The returns are compounded into the principal.
Find how much is invested at each rate so that the two investments
produce the same return after 10 years
Congratulations to Ramachandran Balakrishna who was the winner of the last set of puzzles
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