Ques:- A man rows to a place 48 km distant and come back in 14 hours. He finds that he can row 4 km with the stream in the same time as 3 km against the stream. The rate of the stream is:
Ques:- A man can row his boat with the stream at 6 km/h and against the stream in 4 km/h. The man’s rate is?
Ques:- How to tackle present job
Ques:- Accomplishments & achievements during the intern
Ques:- Why I didn’t chose for the placement offer I received from my campus
Ques:- How many hours a week you want to work?
Ques:- A can do a work in 15 days and B in 20 days. If they work on it together for 4 days, then the fraction of the work that is left is?
Recent Answer : :
8/15 left.
1/15 * 4 + 1/20 * 4 = 7/15
1 – 7/15 = 8/15
Ques:- Why are you interested in oour compnay ?
Ques:- What is ur short term goal and long term goal?
Ques:- The denominator of a fraction is 1 less than twice the numerator. If the numerator and denominator are both increased by 1, the fraction becomes 3/5. Find the fraction?
Ques:- A sum of money place at compound interest doubles itself in 4 years. In how many years will it amount to eight times itself?
Ques:- Find the four digit number in which the first digit is 1/3 of the second, the third is the sum of the first and second, and the last is three times the second.
Recent Answer : :
let the 4 digit number be ABCD.
First Digit is A :
Therefore; according to the question
A=B/3
B=3A
C=A+B=A+3A=4A
D=3B=3(3A)=9A
Since the last Digit is D and it can neither be double-digit nor 0 ;
Therefore ;
A=1;
B=3A=3(1)=3
C=A+B=1+3=4
D=9A=9(1)=9
Therefore, the 4 digit number is 1349.
Ques:- Which country is the largest producer of gold in the world?
A. U.S.A.
B. South Africa
C. Russia
D. Switzerland
Recent Answer : :
China
Ques:- There are some pigeons and hares in a zoo. If heads are counted, there are 200. If legs are counted, there are 580. The number of hares in the zoo is?
Recent Answer : :
X= pigeon
Y= hares
X+Y= 200
2x+4y=580
By solving y= 90
X=110
So Hares= 90
Ques:- Two pipes X and Y together can fill a cistern in 4 hours. Had they been opened separately, then Y would have taken 6 hours more than X to fill cistern. How much time will be taken by X to fill the cistern separately?
Ques:- Can I pursue one additional professional course (MBA) with CA?
Ques:- The G.C.D. of two whole numbers is 5 and their LCM is 60. If one of the number is 20, then the other number would be
A. 13
B. 15
C. 16
D. 25
Recent Answer : :
G.c.d=num1 *num2/lcm
Num1=20
Gcd=5
Lcm=60
5=(20*num2)/60
Num2= 5*60/20
Num2=15
Ques:- 19 boys turn out for hockey. Of these, 11 are wearing hockey shirts and 14 are wearing hockey pants. There are no boys without one or the other. The number of boys wearing full uniform is
Recent Answer : :
( C ) 6
Ques:- A and B can do a piece of work in 8 days. B and C can do it in 12 days and A and C in 16 days. Working together they will complete the work in how many days?
Ques:- Please Introduce yourself
Ques:- Age difference between two brothers is 3 years. After 6 years the ratio between the age is 9:8 What are their ages?
Recent Answer : :
Previous their age was 21 and 18 respectively
Presently, after 6 years the age is 27 and 24.
Ques:- Why do you consider yourself sutiable for the post?
Ques:- WHAT WAS UR FAVOURITE PASTTIME IN UR SCHOOL TIME?
Ques:- About me, my family & qualification.
Ques:- A man walks east and turns right and then from there to his left and then 45degrees to his right.In which direction did he go
Ques:- A ship started from port and moving with I miles per hour and another ship started from L and moving with H miles per hour. At which place these two ships meet?
Ques:- Two employees were there. Employee one says to employee two — your work experience twice as me amp; employee2 to employee1 but two years before you said that your work experience is thrice as me. Employee2 said yes its also true. What are their work experience?…
Ques:- What are your hobbies?
Ques:- What would you do if you lost your current job without information ?
Ques:- Why have you been out of work so long, and how many others were laid off?
Hint: Assume that the speed of the stream is x and the speed of the boat in still water is x. From the statement of the question form two equations in two variables x and y. This system is reducible to linear equations in two variables. Reduce the system to a system of linear equations in two variables by proper substitutions. Solve the system of equations using any one of the methods like Substitution method, elimination method, graphical method or using matrices. Hence find the value of x satisfying both the equation. The value of x will be the speed of the stream.
Complete step-by-step answer:
Let the speed of the stream be x, and the speed of the boat in still water be y.
We have the speed of the boat upstream = y-x.
Speed of the boat downstream = y+ x.
Now since it takes 14 hours to reach a place at a distance of 48 km and come back, we have the sum of the times taken to reach the place downstream and time taken to return back upstream is equal to 14.
Now, we know that time =Distance speed
Using, we get
Time taken to reach the place =48y+x and the time taken to return back =48y−x.
Hence, we have
48y+x+48y−x=14
Dividing both sides by 2, we get
24y+x+24y−x=7 —–(i)
Also, the time taken to cover 4km downstream is equal to the time taken to cover 3km upstream.
Hence, we have 4y+x=3y−x
Transposing the term on RHS to LHS, we get
4y+x−3y−x=0 ——– (ii)
Put 1y+x=t and 1y−x=u, we have
24t+24u=7 ——-(iii)4t−3u=0 ——–(iv)
Multiplying equation (iv) by 6 and subtracting from equation (iii), we get
24t−24t+24u+18u=7⇒42u=7
Dividing both sides by 42, we get
u=742=16
Substituting the value of u in equation (iv), we get
4t−3(16)=0⇒4t−12=0
Adding 12 on both sides, we get
4t=12
Dividing both sides by 4, we get
t=18
Reverting to original variables, we have
1y+x=18 and 1y−x=16
Taking reciprocals on both sides in both equations, we have
y+ x=8 ——- (v)y−x=6 ——–(vi)
Adding equation (v) and equation (vi), we get
2y=14
Dividing both sides by 2, we get
y=7.
Substituting the value of y in equation (v), we get
7+x=8
Subtracting 7 from both sides we get
x = 8-7 =1
Hence the speed of the stream is 1 km/hr.