Question
A boat can cover 84 km upstream and 252 km downstream in
14 hours. Speed of the stream is how much less than the speed of the boat in still water if the boat can cover 63 km upstream and 189 km downstream in 10 hours?Solution
ATQ, ATQ, Let the upstream speed and downstream speed of the boat be x km/h and y km/h, respectively. So according to question: 84/x + 252/y = 14 ………………. (i) Also, 63/x + 189/y = 10 ……….. (ii) Solving (i) and (ii), we get x = 14 and y = 42 So, the upstream speed and downstream speed of the boat are 14 km/h and 42 km/h, respectively. Speed of the boat in still water = (14 + 42)/2 = 28 km/h Speed of the stream = (42 – 14)/2 = 14 km/h So, the desired difference = 28 – 14 = 14 km/h
In the following question, four words are given, out of which only one word is correctly spelt. Find the correctly spelt word.
Four words are given, out of which only one word is spelt correctly. Choose the correctly spelt word.
Select the appropriate answer.
In each group, one word is correctly spelt. Find the correct word.
- In each sentence below four words have been printed in bold which are numbered (1), (2), (3) and (4) One of these words may be misspelt or inappropriate in...
Select the word with the incorrect spelling.
Select the word whose spelling is incorrect.
1) odible
2) awdible
3) audible
4) audibal
5) none of these
In the sentence, four highlighted words are given. One of these words may be misspelt or inappropriate in the context of the sentence. Find out the w...
- Find the incorrectly spelled word in the sentence:
The bank issued a statu a tory warning to clients who were defaulters on their obligations under...
Relevant for Exams:
