Question
If a man rows at the rate of 12 kmph in still water and
his rate against the current is 10 kmph, then the man’s rate along the current is: ÂSolution
Let man’s speed downstream be x kmph. Man’s rate in still water = (x + 10) * ½ kmph 12 = (x + 10) * ½ kmph 24 = (x + 10) kmph X = 24 – 10 = 14 kmph
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Find the maximum value of the function f(x) = x³ – 3x² – 9x + 20.
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(78.03 + 116.98) ÷ 13.211 = 89.9 – 25.23% of ?
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If the perimeter of a square measures 92 cm, what is the area of the square?
