A boat can travel with a speed of 13 km/hr in still water. If the speed of the stream is 4 km/hr, find the time taken by the boat to go 68 km downstream.
In March 2026, which country unveiled the 'Silk-Road Digital Rail', a cross-border optical fiber network connecting 10 nations for high-speed cloud computing?
The ratio of the speed of two cars is 5 : 4. If the first car covers a distance in 4 hours, how much time will the second car take for the same distance?
A dog takes 3 leaps for every 5 leaps of a hare. If one leap of the dog is equal to 3 leaps of the hare, the ratio of the speed of the dog to that of the hare is: