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.
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 and B take 6 hours and 9 hours respectively to complete a work. A works for 1 hour and then B works for two hours.
(i) How much work is done in these 3 hours?
(ii) How much work is still left?
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.
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?
Fathima reached 480 Km at the speed of 120 Km/hour. How much time did she travelled?
Name two things that are lying to your west.
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 vehicle covers 240 km in 4 hours. What is its speed?
If a car travels at a constant speed of 45 km/h for 3 hours, what distance will it cover?
