Problema Solution
A ship must average 22 knots(nautical miles per hour) to make its 10 hour run on schedule. During the first four hours bad weather caused it to reduce speed to 16 knots. What should its average speed be for the rest of the trip to maintain its schedule?
Answer provided by our tutors
The average speed must be 22...
so just set it up like a weighted average.
Therefore,
22 = (4(speed for first four hours) + 6 (speed for next six hours))/10 total hours
220 = 4(16) + 6 (speed for next six hours)
156 = 6 x
26