Question

9. Find two consecutive odd positive integers, sum of whose squares is 290.
10. A train travels a distance of 300 km at constant speed. If the speed of the train is increased by 5 km an hour, the journey would have taken 2 hours less. Find the original speed of the train.
11. Two trains leave a railway station at the same time. The first train travels due west and the second train due north. The first train travels 5 km/hr faster than the second train. If after two hours, they are 50 km apart, find the average speed of each train.
12. The product of Ramu ‘s age (in years) five years ago with his age (in years) 9 years later is 15. Find Ramu ‘s present age.
13. Is the following situation possible? If so, determine their present ages. The sum of the ages of two friends is 20 years. Four years ago, the product of their ages in years was 48.
14. A pole has to be erected at a point on the boundary of a circular park of diameter 13 metres in such a way that the difference of its distances from two diametrically opposite fixed gates A and B on the boundary is 7 metres. Is it the possible to do so? If yes, at what distances from the two gates should the pole be erected?

Answer 1

Answer:

question no 10

let the original speed be x

so ,

300/x -300/x +5 =2

i thik you solve this equation

then answer you got .....