A satellite is orbiting earth at a distance of 42000 km in a circular orbit. It completes one revolution in 24 hours. Calculate its linear speed.
Given, radius,r = 42000 kmand time taken,=24hours. Total distance traveled by the satellite = 2πr =2×3.14×42000=263760 km Linear speed =distancetime =26376024 =10990 kmph
A boat covers a distance of 32 km upstream and 36 km downstream in 7 hours. It also covers a distance of 40 km upstream and 48 km downstream in 9 hours. Find the speed of the boat in still water and that of the stream.
A bus is travelling at a speed of 80km/hr and it takes 8hrs to complete the journey.At what speed should it travel to complete the journey in 6hrs?
A car takes 4 hours to cover a distance if it travels at a speed of 40 kmph. What should be its speed to cover the same distance in 1.5 hours?
A car started at a speed of 10 km/hr and increasing its speed by 5 km/hr for every 1 hour. If the car has travelled for 4 hours then find its average speed.