Question
A boat can cover 66 km upstream and 165 km downstream in
13 hours. Speed of the stream is how much less than the speed of the boat in still water if the boat can cover 55 km upstream and 110 km downstream in 9 hours?Solution
ATQ, Let the upstream speed and downstream speed of the boat be x km/h and y km/h, respectively. So according to question: 66/x + 165/y = 13 ………………. (i) Also, 55/x + 110/y = 9 ……….. (ii) Solving (i) and (ii), we get x = 11 and y = 22 So, the upstream speed and downstream speed of the boat are 11 km/h and 22 km/h, respectively. Speed of the boat in still water = (11 + 22)/2 = 16.5 km/h Speed of the stream = (22 – 11)/2 = 5.5 km/h So, the desired difference = 16.5 – 5.5 = 11 km/h
The temple is several thousand years old and stands on a sea rock ___________ the Indian Ocean .
Back in the twentieth century there was a British punk rock song that repeated over and over again the claim that there were "no more heroes anymore". ...
In the following questions, a sentence is given with two blanks. Identify the correct pair of words that fit in the sentence to make it grammatically a...
Puri became the first city in India where people can __________ high quality drinking water __________ from the tap on 24-hour basis.
- In the following question, a sentence with 2 blanks is given followed by 5 options. From the given options, choose the pair of words that can fit in both t...
I will be at the park ______ 6 o clock.
Each question below has two blanks, which is indicating that something has been omitted. Choose the most suitable option indicating the words that can ...
Even though he failed initially, he refused to _______ and kept working toward his goal.
- Given below is a sentence with one blank. Below the sentence are given four words among which one word might fill the blank. If none of the words fill the ...
Fill in the blanks
The teacher asked the students to ______ quiet.
Relevant for Exams:
