Interested to Buy Any Domain ? << Click Here >> for more details...
three friends a,b,c run around a circular track of length
120m at a speed of 5,7,15m/sec respectively starting
simultaneously from the same point in the same
direction .how often they three will meet????
- 5 Answers
- 16377 Views
- I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / thilak desingh
Guys, there can be two ways of interpreting,
1) How often they meet at any point
2) How often they meet at starting point
1) LCM { L/a-b , L/b-c} = 60 seconds
2) LCM { L/a , L/b , L/c } ~ 120 seconds
| Is This Answer Correct ? | 3 Yes | 2 No |
Answer / manish pal
Soln: When two people are running in the same direction the relative speed is the difference in speeds of the two people.
In this case A=5 B=7 C=15
So relative speed of B wrt A is 7-5 = 3m/s
Relative speed of c wrt to a is 15-3 =15m/s
Therefore relative distances will be:
B wrt A is 120/2 =60
C wrt to A 120/12 =12
So they have to bridge this distance of 60 and 12 between them which is the LCM of 60 and 12 which is 60.
so ans is 60 sec
| Is This Answer Correct ? | 4 Yes | 5 No |
Answer / nisha
Time taken by 'a' to cover a circular track = 120/5 = 24
seconds
Time taken by 'b' to cover a circular track = 120/7 seconds
Time taken by 'c' to cover a circular track = 120/15 = 8
seconds
LCM of 24, 8, 120/7 = 120/7seconds = ~ 17 seconds
So the three friends will meet after ~17 seconds
| Is This Answer Correct ? | 6 Yes | 11 No |
How many 3-digit numbers will be there which are divisible by 19?
COMPLETE THE SERIES 19 48 30 96.... A.144 B. 192 C.160 D. NONE OF THESE
what will be at ?(question mark) place? 1, 7, 9 2, 14, ? 3,105,117 options are : 20,12,14,16
What is the value of 12x-3x-7 when x =-5?
What does cajole means?
Dear sir, I am giving Grade B entrance Exam this Oct 09 for RBI.Kindly guide me as to what book would be good to refer for general awareness for RBI. Rgds Gayathri
What is the job profile
In 8*8 chess board what is the total number of squares refer oder
Please send me the model qestion paper for Po at SBI Please .
I'm also facing the same problem. plz send me model question papers and answers which help me to face interview for clerical staff in sbi.
What are applications of half adder circuit?
Ram gets 148 marks for 20 questions. +10 for correct. -3 for wrong. How many correct answers?
English 
