Advertisements
Advertisements
प्रश्न
The given table shows the distance covered and the time taken by a train moving at a uniform speed along a straight track:
Distance (in m) | 60 | 90 | y |
Time (in sec) | 2 | x | 5 |
The values of x and y are:
विकल्प
x = 4, y = 150
x = 3, y = 100
x = 4, y = 100
x = 3, y = 150
उत्तर
x = 3, y = 150
Explanation:
It is a directional change.
If the speed is uniform, the moving distance covered will be larger than the time taken then,
`\implies 60/2 = 90/x = y/5`
`\implies` x = `(90 xx 2)/60` and y = `(60 xx 5)/2`
x = `180/60` and y = `300/2`
∴ x = 3 and y = 150
APPEARS IN
संबंधित प्रश्न
If the speed of a car is increased by 10 km per hr, it takes 18 minutes less to cover a distance of 36 km. Find the speed of the car.
If the speed of an aeroplane is reduced by 40 km/hr, it takes 20 minutes more to cover 1200 km. Find the speed of the aeroplane.
A goods train leaves a station at 6 p.m., followed by an express train which leaved at 8 p.m. and travels 20 km/hour faster than the goods train. The express train arrives at a station, 1040 km away, 36 minutes before the goods train. Assuming that the speeds of both the train remain constant between the two stations; calculate their speeds.
A plane left 30 minutes later than the schedule time and in order to reach its destination 1500 km away in time, it has to increase its speed by 250 km/hr from its usual speed. Find its usual speed.
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 2 hours, they are 50 km apart, find the speed of each train.
Some school children went on an excursion by a bus to a picnic spot at a distance of 300 km. While returning, it was raining and the bus had to reduce its speed by 5 km/hr and it took two hours longer for returning. Find the time taken to return.
A bus covers a distance of 240 km at a uniform speed. Due to heavy rain its speed gets reduced by 10 km/h and as such it takes two hrs longer to cover the total distance. Assuming the uniform speed to be 'x' km/h, form an equation and solve it to evaluate 'x'.
The speed of train A is x km/h and speed of train B is (x – 5) km/h. How much time will each train take to cover 400 km?
A car is moving with a speed of 100 km/h. If the speed of car first increases by x% and then decreases by x%, the final speed of the car is 96 km/h. The value of x is ______.
The speed of a boat in still water is 15 km/h and speed of stream is 5 km/h. The boat goes x km downstream and then returns back to the point of start is ______.