Sprinter

Sprinter runs the relay 4 x 400 m to the handover at speed 42 km/h. A second runner is at the start of the handover area 20 m long and runs when it is the first sprinter at distance 10 m. Calculate the speed at which the second runner must run in order to handover occurred at the end of the handover area. Consider that the speed of both runners are constant.

Result

v =  28 km/h

Solution:

v/0.020 = 42/(0.020+0.010)

50v = 1400

v = 28

Calculated by our simple equation calculator.

Leave us a comment of this math problem and its solution (i.e. if it is still somewhat unclear...): Be the first to comment! To solve this verbal math problem are needed these knowledge from mathematics:

Do you have a linear equation or system of equations and looking for its solution? Or do you have quadratic equation?

Next similar math problems:

1. The ship The ship went upstream speed of 20 km/h in relation to water. River flows at speed 10 km/h. After half an hour, he stopped and returned downstream to the starting point. How long it took way back when even if downstream speed of ship is 20 km/h in relation
2. Runner 2 Marian run 12 meters in 8 seconds. How far would Marian run for 70 seconds, if still run at the same pace?
3. Cars 6 At 9:00 am two cars started from the same town and traveled at a rate of 35 miles per hour and the other car traveled at a rate of 40 miles per hour. After how many hours will the cars be 30 miles apart?
4. Cenda and Pepa Cenda and Pepa went to the event. Cenda started alone. Canda started after him for 20 minutes. How long took Cenda to catch him? Cenda traveling at 15 km/h, and Pepa traveling at 25 km/h.
5. Unknown number Identify unknown number which 1/5 is 40 greater than one tenth of that number.
6. Simply equation Solve this equation for x: ?
7. Fifth of the number The fifth of the number is by 24 less than that number. What is the number?
8. Equation Solve the equation: 1/2-2/8 = 1/10; Write the result as a decimal number.
9. Father and son Father is 48 years old, son 23. When will be the father twice older than a son?
10. Reciprocal equation Determine the root of the equation: 9/x-7/x=1
11. Liters od milk The cylinder-shaped container contains 80 liters of milk. Milk level is 45 cm. How much milk will in the container, if level raise to height 72 cm?
12. Six years In six years Jan will be twice as old as he was six years ago. How old is he?
13. Storm So far, a storm has traveled 35 miles in 1/2 hour in direction straight to observer. If it is currently 5:00 p. M. And the storm is 105 miles away from you, at what time will the storm reach you? Explain how you solved the problem.
14. Cows 4 cows spent 16 bags of hay in 5 days. How many bags of hay sacks is needed for 5 cows for seven days?
15. 1.5 divided 1.5 divided by 1 = w divided by 4
16. Simple equation Solve for x: 3(x + 2) = x - 18
17. Bicycle The bicycle pedal gear has 36 teeth, the rear gear wheel has 10 teeth. How many times turns rear wheel, when pedal wheel turns 120x?