Question
The speed of a boat in still water is 16/ 3 km/ h. It
was found that the boat takes thrice as much time to row up as it does to row down the same distance in the river stream. Find the speed of the river stream. (in m/sec)Solution
Let the speed of boat in still water =B and speed of stream =S then B=16/3 km/h Let the time taken in downstream =x Then time in upstream =3x Speed of boat in Downstream =B+S Speed of boat in Upstream=B-S Now ATQ-. (B-S)3x =x(B+S) (B-S)/(B+S) =x/3x (B-S) =x … (1) (B+S) =3x … (2) So, Solving after (1) +(2) B=2x, S=x Now- 2x = 16/3 x= 16/6=8/3 x =S = 8/3 ×5/18 Speed of stream = (20/27) m/s
When the digits, which are odd in the number ‘84376529’ are decreased by 2 and the remaining digits are increased by 1, then what is the sum of 5
Statements: S ≤ T < I = M > R, A < Z ≥ O > I ≥ D
Conclusion:
I. S = D
II. R ≤ D
III. Z > T
अपराह्न 1 बजे से रात्रि 10 बजे तक चलते हुए एक घड़ी की घण्टे की �...
N, O, P, Q and R are five friends sitting around a circular table facing away from the centre. P is sitting immediate left of R. P is not an immediate n...
How many such numerals are there in the number ‘736814398’ which will remain at the same position when arranged in ascending order from left to righ...
From the given alternative words, select the word which can be formed using the letters of the given word - TABULATION
If √256 ÷ √x = 2√2, then detemine the value of √x.
How many persons sit between P and R?
A fridge was sold for Rs. 22,680 at a profit of 10%. If it had been sold for Rs. 21,900 instead, what would have been the profit or loss percentage?
Relevant for Exams:
