Question
A boat can cover 80 km upstream and 200 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 64 km upstream and 160 km downstream in 10 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: 80/x + 200/y = 14 ………………. (i) Also, 64/x + 160/y = 10 ……….. (ii) Solving (i) and (ii), we get x = 16 and y = 32 So, the upstream speed and downstream speed of the boat are 16 km/h and 32 km/h, respectively. Speed of the boat in still water = (16 + 32)/2 = 24 km/h Speed of the stream = (32 – 16)/2 = 8 km/h So, the desired difference = 24 – 8 = 16 km/h
Number of letters skipped in between adjacent letters goes on increasing successively by three in the series. Identify the set following the above rule.
Odd one out
Select the odd letters from the given alternatives?
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Find the one which does not belong to that group?
Find the odd set of numbers from the given alternatives.
Which of the following is odd one out?
Four number-pairs have been given, out of which three are alike in some manner and one is different. Select the number-pair that is different.
Select the letter cluster which does not belong to the same group from the given alternatives.
Find the odd one out.
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