MBA Exam

There is an escalator to go from 1st floor to 5th floor which moves at 1 step/second. A man walks up the escalator and takes 36 sec to reach 5th floor from 1st. While coming back he takes the same escalator and requires 108 sec to come down. Had the escalator not moving, how long would he take to walk down from 5th floor to 1st floor???

1) 63
2) 54
3) 45
4) 72

Read Solution (Total 1)

Ans:54
It is same as upstream and downstream.Speed of escalator:x , Man's speed : r
When going up:r+x
When going down:r-x
If escalator not moving:r
r-x,r,r+x in AP
Time : Distance/Speed.If Dist. is same then it is in HP,so
(2*36*108)/(36+108)=54
I hope it helps.:)
7 years agoHelpfull: Yes(0) No(0)

MBA Other Question

Out of 1015 students who got interview calls from IIM-A, 620 students got more than 80% in their 10th standard and 545 students got more than 80% in their 12th standard. It is also known that 38 students who got calls got 80% or less in their 10th and 12th standards.1)how many students got more than 80% in either 10th or 12th standards but not both?2) What is the difference between the number of students who got more than 80% in both 10th and 12th standards to that of the students who got 80% or less in both 10th and 12th standards?3) If the number of students who did not get calls form 700% percent of those students who got calls and have more than 80% in both 10th and 12th students then how many students did not get calls?

1) 789,142,1312
2) 789,150,1316
3) 785,150,1312
4) 789,150,1318
5) 785,142,1312
find the unit digit of (57867^192567) - (1452^876)?

1) 3
2) 5
3) 6
4) 7