Advertisements
Advertisements
Question
A train covers 51 km in 3 hours. Calculate its speed. How far does the train go in 30 minutes?
Advertisements
Solution
Given: Distance = 51 km
Time = 3 hours
∴ Speed = `"Distance"/"Time"`
= `51/3`
= 17 km/h
Now,
Time = 30 minutes = `30/60` h = `1/2` h
Speed = 17 km/h
∴ Distance travelled = Speed × Time
= `17xx1/2`
= 8.5 km
APPEARS IN
RELATED QUESTIONS
A and B working together can do a piece of work in 10 days B alone can do the same work in 15 days. How long will A alone take to do the same work?
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 motorist travelled the distance between two towns, which is 65 km, in 2 hours and 10 minutes. Find his speed in metre per minute.
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?
Wilson reached 240 Km at the speed of 60 Km/hour. How much time did he travelled?
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 far would the motorboats go in three and a half hours?
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?
In one trip the logboat brings about 20 kg of fish. But other types of boats bring a bigger catch as given in the table. The table also shows the speed of each type of boat, which is how far each boat goes in one hour. Look at the table and calculate -
- About how much fish in all will each type of boat bring in seven trips?
| Type of boat | Catch of fish in one trip (in kg) |
Speed of the boat (how far it goes in one hour) |
| Log boat | 20 | 4 km per hour |
| Long tail boat | 600 | 12 km per hour |
| Motorboat | 800 | 20 km per hour |
| Machine boat | 6000 | 22 km per hour |
What is the correct relationship between speed (S), distance (D), and time (T)?
