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ATQ, Let, the speed of the stream be x km/hr. So, upstream speed = (40 – x) km/hr According to the question, 240/(40 – x) = 8 On solving, x = 10 km/hr So, downstream speed = 40 + x = 40 + 10 = 50 km/hr Time taken to cover the distance = 150/50 = 3 hours
Which one of the following elements is not naturally found in human beings?
Select the related word from the given alternatives.
Expand: Contract :: Accurate: ?
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The value of logtan1° + logtan2° +....+logtan89° is: