(Q1) P and Q walk up a moving up escalator at constant speeds. For every 5 steps that P takes Q takes 3 steps. How many steps would each have to climb when the escalator is switched off, given that P takes 50 and Q takes 40 steps to climb up the moving up escalator respectively?
(1) 80 (2) 90(3) 100 (4) None of these
(Q2) A can take 10 steps per second and B can take 7 steps per second. A mischievously starts climbing down an escalator that is moving upwards and at the same instant B starts climbing up the same escalator. They meet after 5 seconds. If the escalator works at a steady rate of 4 steps per second then how many steps are visible when the escalator is stopped?
(1) 90 (2) 80(3) 85 (4) None of these
(Q3) In the above question, if the escalator was shut off at the instant when A and B meet,both being on different steps with A located above B, then how many steps from the ground is the step on which B stands?
If a certain quantity of water, which equals to 10% of the volume of the solution, is added to a solution of milk and water, and then 10% of the solution is removed, the ratio of milk to water becomes 2:3.Find the ratio of milk to water in the original mixture.
20L and 35 L of two different kinds of solution are mixed to obtain a 90% milk solution.What may be the minimum possible ratio of milk and water in the solutions that were initially taken?(Both the solutions contain milk and water only). Plz answer this question friends.soon
3 men and 5 women together can finish a job in 3 days. Working on the samd job 3 women take 5 days more than the time required by 2 men. What is the ratio of efficiency of a man to a woman? A. 2:1, B. 3:2, C. 5:2, D. 4:1
consider one woman's one day work as "w" consider one man's one day work as "m"
from first statemnt: 3m + 5w = (1/3)
let 2 men take "x" days...i.e 2m=(1/x)
now from second statemnt: 3w= (1/(x+5))
solving these equations we will get w= 0.1666666 or w=0.26666666...first value give mnow w=0.26666= (2/75) substituting this value in first equation we get, m=(1/5)hence m:w= 5:2
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Find the number of triangles that can be made using the vertices of an n sided polygon such that none of the sides of the polygon coincides with the side of any triangle.
