Advertisements
Advertisements
Question
An auto rickshaw takes 3 hours to cover a distance of 36 km. If its speed is increased by 4 km/h, the time taken by it to cover the same distance is ______.
Advertisements
Solution
An auto rickshaw takes 3 hours to cover a distance of 36 km. If its speed is increased by 4 km/h, the time taken by it to cover the same distance is 2 h 15 min.
Explanation:
An auto rickshaw takes 3 h to cover a distance of 36 km.
Then, its speed = `36/3` = 12 km/h ...`[∵ "Speed" = "Distance"/"Time"]`
If its speed = 12 + 4 = 16 km/h
Now, timetaken by auto rickshaw to cover 36 km in `36/16` h
= `(36 xx 60)/16`
= 135 min
= 2 × 60 + 15
= 2 h 15 min ...[∵ 1 h = 60 min]
APPEARS IN
RELATED QUESTIONS
A can do a piece of work in 40 days and B in 45 days. They work together for 10 days and then B goes away. In how many days will A finish the remaining work?
If 25 men earn Rs 1000 in 10 days, how much will 15 men earn in 15 days?
A cistern can be filled by a tap in 4 hours and emptied by an outlet pipe in 6 hours. How long will it take to fill the cistern if both the tap and the pipe are opened together?
A birthday party is arranged in third floor of a hotel. 120 people take 8 trips in a lift to go to the party hall. If 12 trips were made how many people would have attended the party?
The number of teeth and the age of a person vary ______
If the area occupied by 15 postal stamps is 60 cm2, then the area occupied by 120 such postal stamps will be ______.
When the distance is kept fixed, speed and time vary directly with each other.
Write whether the following statement vary directly, vary inversely with each other, or neither of the two.
Income tax and the income.
Write whether the following statement vary directly, vary inversely with each other, or neither of the two.
Area of land and its cost.
A swimming pool can be filled in 4 hours by 8 pumps of the same type. How many such pumps are required if the pool is to be filled in `2 2/3` hours?
