A man while going dowm in a escalator(which is miving down)
takes 50 steps to reach down and while going up takes 125
steps. If he goes 5 times faster upwards than downwards.
What will be the total no of steps if the escalator werent
moving.
- 13 Answers
- 27676 Views
- Cadence, CSC, CTS, I also Faced
- E-Mail Answers
Answer Posted / barinder
Let down speed = 1 step/sec; time taken = 50secs = 2t
So up speed = 5 steps/sec; time taken = 125/5 = 25secs = t
let speed of escalator = n steps/sec
by relative motion concept if we make escalator at rest
then
down speed = (1+n) steps/sec
up speed = (5-n) steps/sec
as time taken downwards is double time taken upwards but distance is same so upward speed will be twice the downward speed
2*(1+n) = (5-n)
n = 1 step/sec
down speed = 2 steps/sec
number of steps = 2*50 = 100 steps
| Is This Answer Correct ? | 2 Yes | 1 No |
Post New Answer View All Answers
Two lemons cost 10 cents. Then one and a half dozen cost
if x/y =4 and y is not '0' what % of 'x' is '2x-y'
FIND the next number in the series 11,112,1124,11248,--
2, 3, 6, 7--- using these numbers form the possible four digit numbers that are divisible by 4.
Find the next series number 1, 1, 2, 3, 6, 7, 10, 11, ?
Fathers age is 5 times his son's age. 4 years back the father was 9 times older than son.Find the fathers' present age.
Package information is stored in a) DB2 Directory b) DB2 system tables c) DB2 catalog tables d) None of the above
George while driving along the highway saw road markers which are at equal distances from each other. He crosses the markers every 20 seconds. If he increases his speed by x meters per second, he crosses the markers at every 15 seconds. But if he increases his speed by y meters per second, he crosses the marker at every 10th second. If y-x = 40 meters per second, then what is the distance between two markers.
A student gets 70% in one subject, 80% in the other. To get an overall of 75% how much should get in third subject.
Two circles , one circle is inscribed and another circle is N outscribed over a square. What is the ratio of area of inner to outer circle.
There is 12 perls. One of them is either light or heavy than others. There is a weighing pan. How many trials are needed to find the exceptional one.
Yadi a or b kisi kam ko 12 din me pura krte h tatha b or c usi kam ko 16 din me pura kr sakte h , pahle a is kam ko 5 dino tak karta h fir b 7 dino tk kam ko karta h sesh kam c 13 dino me samapt kr deta h to c akele kam ko kitne dino me pura krega?
Find the next series: AE BH CM DU?
low temperature at the night in a city is 1/3 more than 1/2 hinge as higher temperature in a day. sum of the low temp and higherst temp is 100C. then what is the low temperature
Alphametics are puzzles where each letter stands for a different digit. Here are two alphametics. No word can begin with a zero. We’ve started you out with some of the letters. BASE + BALL -------------- GAMES what these alphabets represent
