Question
A 42 ft guy wire reaches from the top of a pole to a point on the ground 15 ft. from the
pole. Find how high up the pole does the guy wire reach?
pole. Find how high up the pole does the guy wire reach?
Answers
matt
The time t required to empty a tank varies inversely as the rate R of pumping.If a pump
can empty a tank in 50 min.at a rate of 650 k?L/min, how long will it take the pump to
empty the tank at 500kL/min?
can empty a tank in 50 min.at a rate of 650 k?L/min, how long will it take the pump to
empty the tank at 500kL/min?
matt
Mira’s boat goes 12 mph in still water. It travels 45 miles upstream and back in a total time of 8
hr. What is the speed of the current?
hr. What is the speed of the current?
Steve
h^2 + 15^2 = 42^2
t=k/R
So, Rt is constant.
You want t such that 500t = 650*50
since time = distance/speed,
45/(12-x) + 45/(12+x) = 8
t=k/R
So, Rt is constant.
You want t such that 500t = 650*50
since time = distance/speed,
45/(12-x) + 45/(12+x) = 8