stevesunishchiramel stevesunishchiramel

06-08-2019
Physics

contestada

John runs for 10 mins at a uniform speed 9kn/h. At what speed should he run for the next 20mins so that theaverage speed comes to 12km/h.

Respuesta :

MathPhys MathPhys

06-08-2019

Answer:

13.5 km/h

Explanation:

John runs for 10 min at 9 km/h, then 20 min at v. He will have run a total of 30 min at 12 km/h.

Therefore:

(30 min) (12 km/h) = (10 min) (9 km/h) + (20 min) v

v = 13.5 km/h

Answer Link

Otras preguntas

If F'(x)=[tex] \sqrt{1+x^{3} } [/tex] and F(1)=5, then F(3)= (A)1.230 (B)3.585 (C)6.230 (D)8.535 (E)11.230

What is the value of the expression? 8 x (-4.8) divided by (-4) A. –9.6 B. –0.8 C. 0.8 D. 9.6

howto multiply 30 times 30 HELP

Let's assume you use green light (λ = 550 nm) to look at an electron. What is the uncertainty in determining the electron's velocity? Express your answer rounde

The Church during the Middle Ages took on many of the roles that are performed today by which? a. government b.education c. family d. individual per

Which of the following statements summarizes Mexican President Santa Anna’s military goals in capturing the Alamo?

Work in pairs. Find in the text words that mean: chance – to lead – beore – to get to –to enjoy – cuisine – leaving (n) – journey –to notice – area – to buy i

Which microscope did Anton van Leeuwenhoek use to observe single-celled organisms? A) simple microscope B) compound light microscope C) electron microscope D) t

12% of what number is 48

Since 1980, relations between Japan and the United States have been most influenced by the a. imbalance of trade between the two nations. b. refusal of the Unit