The speed of current is 4 km/h. What will be the respective downstream speed and upstream speed of a boy rowing a boat, if half of the distance covered going downstream in a certain time is equal to the distance covered going upstream in the same time?
Let the speed of boy in still water be X km/h. And the speed of current = 4 km/h Downstream speed = (X + 4) km/h Upstream speed = (X – 4) km/h Let time be ‘t’ hours. ⇒ [(X + 4) t]/2 = (X – 4) t ⇒ X + 4 = 2X – 8 ⇒ X = 12 km/h Downstream speed = 12 + 4 = 16 km/h Upstream speed = 12 – 4 = 8 km/h
In the following question, select the odd number pair from the given alternatives.
X @ Y means X is the sister of Y, X # Y means X is the mother of Y and If X * Y means X is the father of Y, then what does H * I @ J # K mean?
'Force' is related to 'Newton' in the same way as 'Pressure' is related to _______ .
Select the combination of letters that when sequentially placed in the blanks of the given letter series will complete the series.
p q _ _ rr _ s...
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Select the option that is related to fifth term in the same way as the second term is related to the first term and the fourth term is related to the th...
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In the following question, select the related word from the given alternatives.
GSJM : PMVJ : : USBN : ?
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