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Start learning 50% faster. Sign in nowLet the speed of boat in still water be x km/hr and the distance be y km. Rate downstream = (x + 3) km/hr Rate upstream = (x – 3) km/hr According to the question, y/(x + 3) = 2 --- (i) y/(x – 3) = 5/2 --- (ii) On dividing equation (i) by (ii), (x – 3)/(x + 3) = 2/(5/2) = 4/5 5x – 15 = 4x + 12 x = 15 + 12 = 27 kmph
Rani and Kavi undertake to do a work together for Rs. 600. Rani alone can do it in 15 days and Kavi alone in 20 days. But with the assistance of Rita th...
The daily wages of A and B respectively are Rs.3.50 and 2.50. When A finishes a certain work, he gets a total wage of Rs. 63. When B does the same work,...
Two men and 7 women can complete a work in 28 days whereas 6 men and 16 women can do the same work in 11 days. In how many days can 7 men complete the s...
A box contains 6 blue shirts, 7 yellow shirts and 9 pink shirts. In how many ways can 4 shirts be drawn from the box, if at least one blue shirt, one ye...
197 ___ 32 ___ 16² ___ 45 ___ 15 = 6,557
Which of the following is the correct order?
The smallest fraction, which should be added to the sum of2(1/2), 3(1/3), 4(1/4) and 5(1/5) to make the result a whole number, is
Solve : (3.2 × 104) ÷ (2 × 105)
The sum of three consecutive even numbers is 28 more than the average of these three numbers. Then the smallest of these three numbers is
In an examination 73%of the candidates passed in quantitative aptitude test, 70% passed in General awareness and 64% passed in both. If 6300 failed in b...
