A bus travelling at 99 km/h completes a journey in 14 hours. At what speed will it have to cover the same distance in 18 hours?
77 km/h
To solve the problem of determining the speed at which a bus must travel to complete the same distance in 18 hours, we can follow these steps:
Step 1: Determine the total distance.
We know the initial speed of the bus is 99 km/h and it completes the journey in 14 hours. Thus, we can calculate the total distance using the formula:
Distance = Speed × Time
Distance = 99 km/h × 14 h = 1386 km
Step 2: Calculate the required speed for 18 hours.
To find the speed required to cover the same distance in 18 hours, we can rearrange the distance formula:
Speed = Distance ÷ Time
Speed = 1386 km ÷ 18 h ≈ 77 km/h
Conclusion:
The bus must travel at approximately 77 km/h to complete the journey in 18 hours. Therefore, the correct answer is 77 km/h.
Important Questions from Speed Time and Distance
A train travelling at a speed of 72 km/hr crosses a post in 20 seconds. If it crosses another train travelling at a speed of 54 km/hr in the same direction in 1 minute 45 seconds, then the difference in length between the two trains is
Rajiv's boat can travel along the current at the 8 km/hour and against the current at the rate 6 km/hour. Find the time taken by the boat to sail 28 km in still water.
Rohit and Dinesh are 64 km apart. Rohit can walk at a speed of 15 km/hr and Dinesh at the speed of 17 km/hr. In how many hours will they meet if they are travelling towards each other?
Two trains running in opposite directions cross a man standing on the platform in 25 seconds and 32 seconds respectively and they cross each other in 30 seconds. The ratio of their speed is:
A worker covers a distance of 81 km in 11 hours. He travels partly on foot at 4.5 km/h and partly on bicycle at 15 km/h. What is the distance covered on the cycle?
