Interested to Buy Any Domain ? << Click Here >> for more details...
There are four dogs/ants/people at four corners of a square
of unit distance. At the same instant all of them start
running with unit speed towards the person on their
clockwise direction and will always run towards that target.
How long does it take for them to meet and where?
- 8 Answers
- 32870 Views
- Microsoft, Panasonic, I also Faced
- E-Mail Answers
Answer Posted / venkat
answer # 3 is almost correct. they will meet at the center however the time they would take according to my calculation is not 1 unit of time but less than 1 unit of time [approx 0.78 unit of time]. the reason being since all of the four are moving tracing arcs toward the center of the square, the distance of the arc is definitely less than 1 unit [little more than half the diagonal distance, half the diagonal distance is about = 0.707 unit]. the question says speed and not velocity. speed is distance traversed / time taken to cover the distance. Here distance is the length of the arc [0.78 unit] to be precise and not even half the diagonal distance [0.70 unit], leave alone the initial distance [1 unit] between the two people. arc length that I got was using this formula: (2 x pi x 0.5) / 4 = 0.78. Further 1 unit speed = 0.78 unit / time and it follows time = 0.78 unit of time.
| Is This Answer Correct ? | 1 Yes | 2 No |
Post New Answer View All Answers
If the circumference of a circle is 100 units, Then what will the length of the arc described by an angle of 20 degree ?
A 16 stored building has 12000 sq.feet on each floor. Company A rents floors and company B rents 4 floors. What is the number of sq.feet of unrented floor space.
three students appear in a test but no one write there name on answer sheet .and they submitted their sheet to teacher . when teacher distributed their answer sheet . what is probability that no one get their own answer sheet.
.Both A and B Alice and Bob play the following chip-off-the-table game. Given a pile of 58 chips, Alice first picks at least one chip but not all the chips. In subsequent turns, a player picks at least one chip but no more than the number picked on the previous turn by the opponent. The player to pick the last chip wins. Which of the following is true?
There are two candles with different thickness, but are of equal length. The thicker one lasts of six hours and the thinner candle last for 2 hours less than the thicker one. Suresh lights the two candles at the same time. When he went to bed he saw the thicker one is twice the length of the thinner one. For how long did Suresh light the two candles.
Mr. Jaweri decided to walk down the escalator on the station. He found that if he walks down 26 steps, he requires 30 seconds to reach the bottom. However, if he steps down 34 stairs he would only require 18 seconds to get to the bottom. If the time is measured from the moment the top step begins to descend to the time he steps off the last step at the bottom, find out the height of the stair way in steps?
A family has several children. Each boy in this family has as many sisters as brothers but each girl has twice as many brothers as sisters. How many brothers and sisters are there?
The diameter of a wheel is 1.26m. If this wheel rotates 500 rotations, how long it can travel?
which one of the following usages was a vedic development?
The minute hand of a clock overtakes the hour hand at intervals of 64 minutes of correct time. How much a day does the clock gain or lose?
A building with height D shadow upto G. What is the height of a neighbouring building with a shadow of C feet.
There r 1200 elephant .some have blue and pink strips.some have pink & green strip. 400 ele. have only pink strip. how many have only blue strip
X and Y are partners in a business. X invests 300 for 12 months and Y invested 600 for 6 months. If they gain a profit of 700 at the end of one year, what is X's share?
A man travelled from the village to the post-office at the rate of 25 kmph and walked back at the rate of 4 kmph. If the whole journey took 5 hours 48 minutes, find the distance of the post-office from the village
Ramesh sit around a round table with some other men. He has one rupee more than his right person and this person in turn has 1 rupee more than the person to his right and so on, Ramesh decided to give 1 rupee to his right & he in turn 2 rupees to his right and 3 rupees to his right & so on. This process went on till a person has 'no money' to give to his right. At this time he has 4 times the money to his right person. How many men are there along with Ramesh and what is the money with poorest fellow.
