Ques:- a train is moving at speed of 25 kmph , another train moving the same direction at a speed of 49 kmph crossed a man in the first train in 10 sec ? wht is the length of the second train ?
Recent Answer : Added by Admin On 2020-05-17 12:04:15:
Relative velocity of trains = 49kmph -25 kmph = 24kmph
=6.67m/s
Time taken to cross the first train = 10 sec
Length of the second train = Relative Velocity * Time taken
to cross the first Train = 6.67 *10 = 66.7 metres
Ques:- The difference between the two digit number and the number obtained by interchanging its digits is 54. The difference between the digits is?
Recent Answer : Added by Sadman Sakib On 2022-01-08 16:06:25:
6
Ques:- Hardware Related
Ques:- The average of 11 results is 50, if the average of first six results is 49 and that of the last six is 52. Find the sixth result?
Ques:- What is the average of first five prime numbers greater than 20 ?
Ques:- Train P crosses a pole in 30 seconds and train Q crosses the same pole in one minute and 15 seconds. The length of train P is three-fourths the length of train Q. What is the ratio of the speed of train P to that of train Q?
Recent Answer : Added by Prathyush On 2021-11-13 15:43:18:
Ques:- If instead of multiplying a number by 7 the number was divided by 7. What should be the percentage error?
Recent Answer : Added by Rushi Maralkar On 2023-04-27 17:34:11:
% error= (new no-actual no)/actual no *100
% error= [(x/7)-7x]/7x * 100
% error= 48x/49x * 100
% error= 0.9795*100=97.95
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Ques:- Two trains 140 m and 160 m long run at the speed of 60 km/hr and 40 km/hr respectively in opposite directions on parallel tracks. The time which they take to cross each other is?
Ques:- The size of the bucket is N kb. The bucket fills at the rate of 0.1 kb per millisecond. A programmer sends a program to receiver. There it waits for 10 milliseconds / and response will be back to programmer in 20 millisecond. How many much time the program takes to get a response back to programmer, after it is sent? Plz explain..
Recent Answer : Added by 9074743593 On 2021-07-29 16:19:39:
30
Ques:- P began business with Rs.45000 and was joined afterwards by Q with Rs.5400. When did Q join if the profits at the end of the year were divided in the ratio of 2:1?
Ques:- A polygon has maximum 1325 diagonals. How many vertices does it have?
Recent Answer : Added by DK BOSS On 2021-07-15 08:05:23:
The formula to find number of diagonals (D) given total number of vertices or sides (N) is
N * (N – 3)
D = ———–
2
Using the formula, we get
1325 * 2 = N * (N – 3)
N2 – 3N – 2650 = 0
Solving the quadratic equation, we get N = 53 or -50
It is obvious that answer is 53 as number of vertices can not be negative.
Alternatively, you can derive the formula as triange has 0 diagonals, quadrangel has 2, pentagon has 5, hexagon has 9 and so on……
Hence the series is 0, 0, 0, 2, 5, 9, 14, …….. (as diagram with 1,2 or 3 vertices will have 0 diagonals).
Using the series one can arrive to the formula given above.
Ques:- A pipe can fill a tank in 30 min B can fill in 28 min then if 3/4 th of tank can be filled by B pipe and after wards both are opened then how much time is required by both the pipes to fill the tank completely.
Recent Answer : Added by Admin On 2020-05-17 12:00:13:
105/29 mins
Ques:- A football team played 60 matches out of which 30% were won by them. If they start winning all the next matches after how many matches will the average winning rate be 50% ?
Recent Answer : Added by Suman On 2021-10-07 15:41:23:
Matches played: 60.
Matches won: 30% of 60 => (60*(30/100)) = 18 matches.
Iterative approach:
On adding 1 to matches played and matches won, on every iteration until the win percentage gets to 50. So
19 / 61 = 0.3114754098360656
20 / 62 = 0.3225806451612903
21 / 63 = 0.3333333333333333
22 / 64 = 0.34375
…
…
…
…
Similarly,
41 / 83 = 0.4939759036144578
42 / 84 = 0.5
So, after 60th match 24 more matches has to be played and won to get 50% average winning rate.
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Ques:- Find out the wrong number in the series:
6, 12, 48, 100, 384, 768, 3072
A. 48
B. 100
C. 384
D. 768
Recent Answer : Added by narendra On 2022-09-22 16:43:05:
B. 100
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Ques:- A boy multiplied a number with 10 and got 100. If he divided it by 10, what would be the answer?
Recent Answer : Added by deepti On 2021-05-28 08:49:33:
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Relative velocity of trains = 49kmph -25 kmph = 24kmph
=6.67m/s
Time taken to cross the first train = 10 sec
Length of the second train = Relative Velocity * Time taken
to cross the first Train = 6.67 *10 = 66.7 metres