Raju is walking down an escalator (a moving staircase) which is moving down. From the top, he takes 20 steps to reach the bottom, while Rajat, who walks twice as fast as Raju, takes 30 steps from the top to reach the bottom.Question No. 11DIRECTIONS for questions 11 and 12: Type in your answer in the input box provided below the question.Find the total number of steps visible at any point of time on the escalator.

Ely walks down to the bottom of an escalator that is moving up and he counts 150 steps. Her friend, Mia walks up to the top of the escalator and counts 75 steps. If Ely’s speed of walking (in steps per unit time) is three times Mia’s walking speed, how many steps are visible on the escalator at a given time? Assume that this value is constant

Elaine takes 77 seconds to climb up a flight of 50 steps if she runs up 20 steps and walks up the rest of the way. She will take 98.5 seconds to climb the flight of 50 steps if she runs up 10 steps and walks the rest of the way. How long will Elaine take if she runs all the way up the 50 steps? (Assuming that Elaine’s running and walking speeds are constant.)

Count ways to reach the nth stair

You are climbing a staircase. It takes n steps to reach the top.Each time you can either climb 1 or 2 steps. In how many distinct ways can you climb to the top? Example 1:Input: n = 2Output: 2Explanation: There are two ways to climb to the top.1. 1 step + 1 step2. 2 stepsExample 2:Input: n = 3Output: 3Explanation: There are three ways to climb to the top.1. 1 step + 1 step + 1 step2. 1 step + 2 steps3. 2 steps + 1 step Constraints:1 <= n <= 45

Anju and Bobby simultaneously started climbing up an ascending escalator (a moving staircase). Since they were in a hurry, they also started climbing up the steps (taking one step at a time). Anju took k steps in the time that Bobby took 1 step, where k is an integer greater than 1. How many values can k assume, if it is known that the speed of the escalator was the same as that of Bobby and Anju took a total of 72 steps to climb up the escalator? (Assume that the number of steps taken by Bobby was also an integer)