Question
A boat takes 24 hours to cover 'q' km in still water.
While traveling downstream, it takes 16 hours to cover (q - 80) km. If the speed of the boat in still water is 4 times the speed of the stream, then find the speed of the stream.Solution
ATQ, Let the speed of the stream be = v km/h. Speed of the boat in still water = 4v km/h. Using the equation: 
Downstream speed = 4v + v = 5v km/h. Using the downstream equation: 
From equations (I) and (II): 
Thus, the speed of the stream is 5 km/h.
Which Indian author penned ‘Godaan’ (‘The Gift of Cow’)?
Match List – I with List – II and select the correct answer using the codes given below the lists:
Direct change of gas to solid without changing in to liquid is called _________.
Two lenses of powers +2.0 D and –2.5 D are combined to make an optical instrument. The combination will
Which freedom fighter is popularly known as Lok Nayak?
What is the current Cash Reserve Ratio (CRR) fixed by the Reserve Bank of India (RBI)?
In which state/UT is the Hemis festival celebrated?
Which of the following states is least likely to be among the top five contributors (installed renewable capacity) toward India’s renewable targets (i...
Who among the following elect(s) the presiding officer of the Vidhan Sabha in India?
Which chemical element of Group 18 of the periodic table is produced by the natural radioactive decay of uranium in soils and rocks?
Relevant for Exams:
