math
posted by Bob .
An escalator moves down at the rate of 60 steps per minute. Alan can walk fast up ordinary steps at the rate of 80 steps per minute. There are 50 steps from one level to another. Alan decides to walk fast up the down escalator. How long will it take him to go up one level?

Up rate on the down escalator = 80  60 = 20 step/min. Time spent going up one level = 50/20 =2.5 minutes
Respond to this Question
Similar Questions

physics...
As Alan is taking a shower, the soap falls out of the dish and Alan steps on it with a force of 500 N. If Alan slides foward and the frictional force between the soap and the tub is 50 N, what is the coefficient of friction between … 
Physics
As Alan is taking a shower, the soap falls out of the dish and Alan steps on it with a force of 500 N. If Alan slides forward and the frictional force between the soap and the tub is 50 N, what is the coefficient of friction between … 
Physics
As Alan is taking a shower, the soap falls out of the dish and Alan steps on it with a force of 500 N. If Alan slides forward and the frictional force between the soap and the tub is 50 N, what is the coefficient of friction between … 
Physics
As Alan is taking a shower, the soap falls out of the dish and Alan steps on it with a force of 500 N. If Alan slides forward and the frictional force between the soap and the tub is 50 N, what is the coefficient of friction between … 
Algebra Grade 7
A cat likes to play on stairs. Starting at the bottom landing, the cat jumped up 4 steps, then down 2 steps. Then the cat jumped up 5 steps and fell down 3. In two more jumps of 4 steps and then 2 steps, the cat reached the top of … 
Math
Annie likes to walk 2 steps, jump 2 steps and then skip 2 steps. If she does this pattern over and over again for a total of 52 steps, how many jumping steps will she make? 
math
Annie likes to walk 2 steps, jump 2 steps and then skip 2 steps. If she does this pattern over and over again for a total of 52 steps, how many jumping steps will she make? 
Ap Physics
An escalator in a shopping centre carries people up through a height h at a vertical speed of v, but youâ€™re in a hurry when you step onto it, so you climb the moving steps (each with a height of hs) at a rate of n steps/s. Determine: … 
physics
calculate the number of kilocalories needed to climb 232 stair steps (116 steps per minute for 2 min.) climbing stairs (116/min.) = energy consumption rate is 9.8 (kcal/min) 
math
An escalator in a department store moves down at the rate of 64 steps per minute. Julie can walk fast up ordinary steps at the rate of 96 steps per minute. In the store, there are 48 steps from one level to another. Julie decides to …