Advertisements
Advertisements
प्रश्न
A car moves a distance of 2592 km with uniform speed. The number of hours taken for the journey is one-half the number representing the speed, in km/hour. Find the time taken to cover the distance.
उत्तर
Distance covered = 2592 km
Let the speed of the car be x km/h
According to the question, Time =
\[\frac{\text { speed }}{2} = \frac{x}{2}h\]
we know that \[\text { speed } = \frac{\text { distance} }{\text { time }}\]
\[x = \frac{2592}{x/2}\]
\[ x^2 = 5184\]
\[x = \sqrt{5184}\]
\[x = 72\]
\[\text { Speed of the car } = 72 \text { km/h }\]
\[\text { Time taken to cover the given distance = 36 h }\]
APPEARS IN
संबंधित प्रश्न
In a class test, the sum of Kamal’s marks in mathematics and English is 40. Had he got 3 marks more in mathematics and 4 marks less in English, the product of the marks would have been 360. Find his marks in two subjects separately.
The product of Tanvy’s age (in years) 5 years ago and her age is 8 years later is 30. Find her present age.
A truck covers a distance of 150 km at a certain average speed and then covers another 200 km at an average speed which is 20 km per hour more than the first speed. If the truck covers the total distance in 5 hours, find the first speed of the truck.
The length of a rectangular field is three times its breadth. If the area of the field be 147 sq meters, find the length of the field.
Satvik observed that in a clock, the time needed by the minute hand of a clock to show 3 PM was found to be 3 min less than `"t"^2/4` minutes at t minutes past 2 PM. Then t is equal to:
A takes 6 days less than B to finish a piece of work. If both A and B together can finish the work in 4 days, find the time taken by B to finish the work.
Raj and Ajay are very close friends. Both the families decide to go to Ranikhet by their own cars. Raj’s car travels at a speed of x km/h while Ajay’s car travels 5 km/h faster than Raj’s car. Raj took 4 hours more than Ajay to complete the journey of 400 km.
What will be the distance covered by Ajay’s car in two hours?
Raj and Ajay are very close friends. Both the families decide to go to Ranikhet by their own cars. Raj’s car travels at a speed of x km/h while Ajay’s car travels 5 km/h faster than Raj’s car. Raj took 4 hours more than Ajay to complete the journey of 400 km.
What is the speed of Raj’s car?
The speed of a motorboat is 20 km/hr. For covering the distance of 15 km the boat took 1 hour more upstream than downstream.
Which is the correct quadratic equation for the speed of the current?
The speed of a motorboat is 20 km/hr. For covering the distance of 15 km the boat took 1 hour more upstream than downstream.
How much time boat took in downstream?