Mr. Arun rows a boat with the stream at 10 km/hr and against the stream in 5 km/hr. In still water, his rate of rowing in km/h is:
Let the man's speed is 'x' and that of stream flow is 'y'. Then, x + y = 10 ----- (i) => x - y = 5 ------ (ii) Solving (i) and (ii) we get, => x = 7.5 km/hr
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If tan θ + cot θ = 5, then the value of tan2 θ + cot2 θ + 2tan2 60° is:
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If a six digit number 3x 7z 8y is divisible by 7, 11, 13, then the average value of x, y, z is:
