Answer:
Let speed of the stream be x km/hr
Given speed of boat = 5 km/hr speed of
boat in going upstream = (5 - x) km/hr speed of boat in going downstream = (5 +
x) km/hr
Now, time taken in going 40 km upstream
This taken is going 40 km downstream
According to question:
speed
of stream = 2-5 km/hr
OR
Let the number of correct answers be x and number of wrong
answers be y
Mark awarded for each correct answer Mark
awarded for x correct answers
Also, mark deducted for each wrong answer
Mark
deducted for y wrong answers
According to question
...(1)
and
...(2)
On adding (1) and (2), we get
number
of correct answers given by Jyanti = 100
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