Question
Time taken by a boat to cover 253 km upstream is 49.99 %
more than the time taken by the boat to cover 340 km downstream. Total time taken in covering both these distances was 5 hours 42 seconds. Find the approximate distance covered in upstream in 3 hrs 10 sec.Solution
Let the speed of boat and stream be x km/hr and y km/hr respectively. Speed in upstream = (x – y) km/hr Speed in downstream = (x + y) km/hr ATQ: => 253/(x – y) = 3/2 × 340/(x + y) => {253/(x – y)}/{340/(x + y)} = 3/2 [ratio of time taken] Now, given that the total time taken to cover the distance is 5 hrs 42 sec or 5 hrs approx. So, 253/(x – y) = 3 and 340/(x + y) = 2 x - y = 84-----(i) x + y = 170-----(ii) solving equation (i) and (ii) we get, x = 127 y = 43 Therefore, approximate distance covered in upstream in 3 hrs 10 sec = (127 – 43) × 3 = 252 km
Select the missing number from the given series.
41, 83, 168, 339,?
A, B, C, D, E, F, G and H are sitting around a square table facing the centre of the table. Four of them are sitting at each of the corners, while the o...
Three of the following four figure pairs are alike in a certain way and thus form a group. Which is the one that does not belong to that group?
<...
Select the option that represents the correct order of the given words as they would appear in an English dictionary.
1. Luxury
2. Lyrics<...
In a certain code, JEALOUS is written as BFKKTVP. How is HEARTEN written in that code?
The position of how many letters will remain unchanged if each of the letters in the word ‘PRANKED’ is arranged in the English alphabetical order? ...
ADGJ : MPSV :: ? : NQTW
Select the option in which the given figure is embedded (rotation is NOT allowed).
Four pairs of words have been given out of which three are consistent with each other in some manner while one is inconsistent with them. Select the odd...
According to the equation P4Q5R5S, what is the relation between the son of P to son of S?
