31. Two numbers x & y are such that the sum of 6% of x and 5% of y is (frac{3}{5}) of the sum of 6% of x and 7% of y. Then find the ratio of x and y. View Solution 32. The ratio of number of boys to that of girls in a school is 5 : 1. If 70% of boys and 60% of...
21. A was travelling in his boat, when the wind blew his hat off and the hat started floating back downstream. The boat continued to travel upstream for 15 more minutes before A realized that his hat had fallen off and turned back downstream. He caught up with that as...
11. A boat moves with a speed of 13 km/h downstream and 7 km/h upstream. Find the speed of the boat and stream.Sol: B + W = 13B – W = 7B = 10 km/hW = 3 km/h Answer Video Solution on Youtube 12. A man can row 45 km upstream and 66 km downstream in 15 h....
31. In a 1 km race, the speeds of A and B are in the ratio of 5 : 3 and A wins by 10 seconds. Find the time taken by B to finish the race and distance covered by B when A finishes the race.Sol:Distance is constant∴ Time ∝...
21. A and B run a race of 2000m. First A gives B a start of 200m and beats him by 30 sec. Next, A gives B a start of 3 minutes and is beaten by 1000m. find the time in minutes in which A and B can run the race...
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