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This page contains the most recently asked technical questions and answers in the Brainvire Infotech.
All of the questions listed below were collected by students recently placed at Brainvire Infotech.
Ques:- There is a 50m long army platoon marching ahead. The last person in the platoon wants to give a letter to the first person leading the platoon. So while the platoon is marching he runs ahead, reaches the first person and hands over the letter to him and without stopping he runs and comes back to his original position. In the mean time the whole platoon has moved ahead by 50m. The question is how much distance did the last person cover in that time. Assuming that he ran the whole distance with uniform speed.
Recent Answer : Added by Admin On 2020-05-17 12:00:37:
The last person covered 120.71 meters.
It is given that the platoon and the last person moved with
uniform speed. Also, they both moved for the identical
amount of time. Hence, the ratio of the distance they
covered – while person moving forward and backword – are
equal.
Let’s assume that when the last person reached the first
person, the platoon moved X meters forward.
Thus, while moving forward the last person moved (50+X)
meters whereas the platoon moved X meters.
Similarly, while moving back the last person moved [50-(50-
X)] X meters whereas the platoon moved (50-X) meters.
Now, as the ratios are equal,
(50+X)/X = X/(50-X)
(50+X)*(50-X) = X*X
Solving, X=35.355 meters
Thus, total distance covered by the last person
= (50+X) + X
= 2*X + 50
= 2*(35.355) + 50
= 120.71 meters
Note that at first glance, one might think that the total
distance covered by the last person is 100 meters, as he
ran the total lenght of the platoon (50 meters) twice.
TRUE, but that’s the relative distance covered by the last
person i.e. assuming that the platoon is stationary.
Ques:- In a class , except 18 all are above 50 years. 15 are below 50 years of age. how many people are there
A. 30
B. 33
C. 36
D. none of these.
Recent Answer : Added by sangeetha On 2022-08-14 16:41:56:
33
Ques:- In a factory, 'a' men work 'b' hours a day and produce 'c' articles each day. If 'd' men are released, how many hours a day will the remaining men have to work to produce 'c' articles each day? 1]ab/d 2]ab/b 3]a-d/b 4]ab/a-d
Ques:- How did you know what the other person had been looking forand what did you do to go the extra mile?
Ques:- Can u give me an example of a project you were involved with that illustrates your interest and skills in bringing people together?
Ques:- If a: b = 3:4, b:c = 7:9, c:d = 5:7, Evaluate a:d?
Recent Answer : Added by Sudharsan On 2022-03-09 16:26:23:
3:7
Ques:- The current of a stream runs at the rate of 4 kmph. A boat goes 6 km and back to the starting point in 2 hours, then find the speed of the boat in still water?
Ques:- A and B rent a pasture for 10 months. A put in 80 cows for 7 months. How many can B put in for the remaining 3 months, if he pays half as much again as A?
Ques:- A rectangular courtyard, the sides of which are in the ratio of 4:3, cost Rs.600 for paving at 50 p per m2; find the length of the diagonal of the courtyard?
Recent Answer : Added by Tduwem On 2021-11-13 11:02:25:
5
Ques:- In a certain code, MONKEY is written as XDJMNL. How is TIGER written in that code?
Recent Answer : Added by Chuks On 2021-09-02 08:08:05:
MONKEY=YEKNOM then each letter is moved backward =XDJMNL so for TIGER=REGIT the each of the reversed letters are moved backward=QDFHS
Ques:- A sum of money triples itself in twelve years at simple interest. Find the rate of interest?
Ques:- A, B and C can do a work in 6 days, 8 days and 12 days respectively. In how many days can all three of them working together, complete the work?
Recent Answer : Added by Sam Guo On 2022-04-02 06:59:27:
3days
Ques:- Describe a project/experience that you found enjoyable and demanding?
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The last person covered 120.71 meters.
It is given that the platoon and the last person moved with
uniform speed. Also, they both moved for the identical
amount of time. Hence, the ratio of the distance they
covered – while person moving forward and backword – are
equal.
Let’s assume that when the last person reached the first
person, the platoon moved X meters forward.
Thus, while moving forward the last person moved (50+X)
meters whereas the platoon moved X meters.
Similarly, while moving back the last person moved [50-(50-
X)] X meters whereas the platoon moved (50-X) meters.
Now, as the ratios are equal,
(50+X)/X = X/(50-X)
(50+X)*(50-X) = X*X
Solving, X=35.355 meters
Thus, total distance covered by the last person
= (50+X) + X
= 2*X + 50
= 2*(35.355) + 50
= 120.71 meters
Note that at first glance, one might think that the total
distance covered by the last person is 100 meters, as he
ran the total lenght of the platoon (50 meters) twice.
TRUE, but that’s the relative distance covered by the last
person i.e. assuming that the platoon is stationary.