# Speed of car

The car went to a city that was 240 km away. If his speed increased by 8 km/h, it would reach the finish one hour earlier. Determine its original speed.

Result

v =  40 km/h

#### Solution:  Checkout calculation with our calculator of quadratic equations.

Leave us a comment of example and its solution (i.e. if it is still somewhat unclear...):

Showing 0 comments: Be the first to comment! #### To solve this example are needed these knowledge from mathematics:

Looking for help with calculating roots of a quadratic equation? Do you have a linear equation or system of equations and looking for its solution? Or do you have quadratic equation?

## Next similar examples:

1. Wind drift The plane flies at 860 km/h, passing distance 3000 kilometers with the wind and once again against the wind for 6 h 59 min. What is the wind speed?
2. Family Family has 4 children. Ondra is 3 years older than Matthew and Karlos 5 years older than the youngest Jane. We know that they are together 30 years and 3 years ago they were together 19 years. Determine how old the children are.
3. Roots Determine the quadratic equation absolute coefficient q, that the equation has a real double root and the root x calculate: ?
4. Expression with powers If x-1/x=5, find the value of x4+1/x4
5. Quadratic equation Find the roots of the quadratic equation: 3x2-4x + (-4) = 0.
6. Algebra X+y=5, find xy (find the product of x and y if x+y = 5)
7. Three unknowns Solve the system of linear equations with three unknowns: A + B + C = 14 B - A - C = 4 2A - B + C = 0
8. Lee is Lee is 8 years more than twice Park's age, 4 years ago, Lee was three times as old. How old was Lee 4 years ago?
9. Equation Equation ? has one root x1 = 8. Determine the coefficient b and the second root x2.
10. Legs Cancer has 5 pairs of legs. The insect has 6 legs. 60 animals have a total of 500 legs. How much more are cancers than insects?
11. Square root 2 If the square root of 3m2 +22 and -x = 0, and x=7, what is m?
12. Linsys2 Solve two equations with two unknowns: 400x+120y=147.2 350x+200y=144
13. Theorem prove We want to prove the sentense: If the natural number n is divisible by six, then n is divisible by three. From what assumption we started?
14. Discriminant Determine the discriminant of the equation: ?
15. Father 7 Father is 6 times older than his son. After 4 years, the father will only be 4 times older. What are their present ages?
16. Solve 3 Solve quadratic equation: (6n+1) (4n-1) = 3n2
17. Elimination method Solve system of linear equations by elimination method: 5/2x + 3/5y= 4/15 1/2x + 2/5y= 2/15