Advertisements
Advertisements
Question
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?
Advertisements
Solution
In 1 hour the boat travels 4 km
Hence, in 2 hours the boat will travel 2 × 4 = 8 km
And in `1/2` hour the boat will travel `4/2` = 2 km
So, in 2 and a half-hour, the boat will travel 8 + 2 = 10 km.
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 can do a piece of work in 4 days and B can do the same work in 5 days. Find, how much work can be done by them working together in:
- one day
- 2 days
What part of work will be left, after they have worked together for 2 days?
Mohit can complete a work in 50 days, whereas Anuj can complete the same work in 40 days. Find:
(i) work done by Mohit in 20 days.
(ii) work left after Mohit has worked on it for 20 days.
(iii) time taken by Anuj to complete the remaining work.
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.
Rohit goes 350 km in 5 hours. Find:
(i) his speed
(ii) the distance covered by Rohit in 6.2 hours
(iii) the time taken by him to cover 210 km.
A boy drives his scooter with a uniform speed of 45 km/h. Find the distance covered by him in 1 hour 20 min.
I travel a distance of 10 km and come back in `2 1/2` hours. What is my speed?
Name two things that are lying to your west.
What is the correct relationship between speed (S), distance (D), and time (T)?
A vehicle covers 240 km in 4 hours. What is its speed?
