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
Column (1)
Column (1)
In the following questions, two columns are given, containing three phrases each. A phrase from the first column may or may not connect with a phrase f...
Column (1)
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- In the following question, two columns are given containing three sentences/phrases each. In the first column, sentences/phrases are A, B, and C; in the se...
In each of the following questions, two columns are given containing three sentences/ phrases each. A sentence or phrase from the first column may or m...
Column (1)
Directions: Match the words in Column A with their meanings in Column B, and choose the correct combination from the options given below:
...Relevant for Exams:
