Let the speed of boat in still water be x km/hr and the distance be y km. Rate downstream = (x + 2) km/hr Rate upstream = (x – 2) km/hr According to the question, y/(x + 2) = 5 --- (i) y/(x – 2) = 11/2 --- (ii) On dividing equation (i) by (ii), (x – 2)/(x + 2) = 5/(11/2) = 10/11 11x – 22 = 10x + 20 x = 22 + 20 = 42 kmph
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Two containers have mixtures of milk and water, respectively, in the ratio 1:4 and 7:4 in what ratio should the contents be mixed so that the ratio of m...
On reducing the marked price of his goods by ₹28, a shopkeeper gains 20%. If the cost price of the article be ₹560 and it is sold at the marked pric...
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A school conducted a survey on the number of students participating in various extracurricular activities over three years. The data is as follows (in n...
A glass contains a certain quantity of vodka. After removing 8 liters of vodka and replacing it with lime, this process is repeated twice more—first, ...
