Question
A cyclist usually takes 6 hours
to cover 240 kilometres. Find the time taken by the cyclist to cover the same distance if he travels at 25% of his usual speed.Solution
ATQ, Usual speed of the cyclist = (240/6) = 40 km/h New speed of the cyclist = 0.25 Ă— 40 = 10 km/h New time taken = (240/10) = 24 hours Alternate Solution: Let the usual speed of the cyclist be 10x km/hr. Therefore, decreased speed = 2.5x km/hr Since the distance covered is the same and time taken is inversely proportional to the speed: Ratio of time taken with usual speed to time taken with reduced speed = 6:24 = 1:4 Required time taken = 6 Ă— (4/1) = 24 hours
A man goes to Mumbai from Pune at a speed of 4 km/hr and returns to Pune at speed of 6 km/hr. What is his average speed of the entire journey?
- A motorbike usually covers 180 metres in 9 seconds. How much distance (in km) can the motorbike cover in 1.5 hours if it travels at 90% of its normal speed...
Anuj covered a distance of 188 km in 8 hours. He traveled part of the distance on a cycle at a speed of 15 km/hr and the remaining distance by walking a...
- Two individuals, 'A' and 'B', set off towards each other from points 'P' and 'Q', respectively. 'A' moves at a speed of (x + 8) km/hr, while 'B' travels at...
- A runner, going at five-sixths of her normal speed, takes 10 minutes longer than usual to complete a race. What is her usual time?
A man travels a specific distance at a given speed, completing the journey in a set amount of time. If he had reduced his speed by 10 km/h, it would hav...
The aeroplane flies along a Square field @ 100, 200, 300 and 400 km/hours respectively. Then find the Average speed of the aeroplane during the whole jo...
A train 180 meters long passes a man walking in the same direction at 6 km/h in 15 seconds. What is the speed of the train?
- A traveler at four-fifths of his normal speed takes 20 minutes longer than his usual time to reach his destination. What is his usual travel time?
Relevant for Exams:
