Advertisements
Advertisements
प्रश्न
A man walks a distance of 5 km in 2 hours. Then he goes in a bus to a nearby town, which is 40 km, in further 2 hours. From there, he goes to his office in an autorickshaw, a distance of 5 km, in `1/2` hour. What was his average speed during the whole journey?
Advertisements
उत्तर
Distance of 5 km travelled on foot in 2 hours
Distance of 40 km travelled by bus in 2 hours
Distance of 5 km travelled by Rickshaw in `1/2` hour
Total distance covered = 5 + 40 + 5 = 50 km
Time taken = `2+2+1/2=4 1/2=9/2` hours
∴ Average speed = `"Distance"/"Time"`
= `50/(9/2)`
= `(50xx2)/9`
= `100/9` km/h
= `11 1/9` km/h
APPEARS IN
संबंधित प्रश्न
A, B and C can do a piece of work in 12, 15 and 20 days respectively. How long will they take to do it working together?
A train travels 700 metres in 35 seconds. What is its speed in km/h?
A boy drives his scooter with a uniform speed of 45 km/h. Find the distance covered by him in 1 hour 20 min.
Jagan went to another town such that he covered 240 km by a car going at 60 kmh-1. Then he covered 80 km by a train, going at 100 kmh-1 and the rest 200 km, he covered by a bus, going at 50 kmh-1. What was his average speed during the whole journey?
The speed of sound in air is about 330 ms-1. Express this speed in kmh-1. How long will the sound take to travel 99 km?
Mr. Amit can walk 8 km in 1 hour 20 minutes. How long will it take him to walk:
(i) 2500 m?
(ii) 6.5 km?
| S.No | Speed | Distance | Time (Hours) |
| i | 35 Km/hour | 280 Km | |
| ii | 40 Km/hour | 360 Km | |
| iii | 45 Km/hour | 315 Km | |
| iv | 50 Km/hour | 300 Km | |
| v | 55 Km/hour | 275 Km |
These log boats do not go very far. If the wind is helpful, then travel about 4 km in one hour.
How long will they take to go a distance of 10 km?
Look at the different types of boats.
Some boats have motors and go further into the sea. since they go far out they can catch more fish. These boats travel faster, at a speed of about 20 km in one hour.
How much time will they take to go 85 km?
A runner covers 900 m in 3 min. Speed in m s⁻¹ is:
