harrypotterfan1118 harrypotterfan1118
  • 11-05-2019
  • Mathematics
contestada

A train, 200 m long, travelled through a tunnel at an average speed of 20m/s. The whole train took 2 min 30 sec to pass through the tunnel completely. Find the length of the tunnel in kilometres?

Respuesta :

r3t40
r3t40 r3t40
  • 11-05-2019

[tex]

l_t=200m \\

s=20\frac{m}{s} \\

t=2\times60+30=150s \\

l=? \\

s=\frac{l}{t}\Longrightarrow l=st \\

l=20\frac{m}{s}\times150s=3000m=\boxed{3km}

[/tex]

Answer Link

Otras preguntas

Help me plz cant work it out
PLEASE HELP!!! WILL MARK BRAINLIEST!!!Spencer is asked to factor the polynomial 256x^4 y^2-y^2completely over the integers. His work is shown below.256x^(4)y^(2
The equations y = -4x - 1 and y =- 4x + 2 represent what types of lines?
SUM ONE HELP ITS MY EXAM Question 7(Multiple Choice Worth 3 points) (02.05 MC) Which of the following is true of the executive branch? It can decide who gets to
Help me plz cant work it out
how many star are thier in the universe​
what is 5 times 25 divided by the square root of 225 subtracted from 10,247 and than added to pie.
Nepal is poor country why​
Simplify the given expression. Assume that no variable equals 0. (14x20y10 / 28x12y14)4
What is the range, min, and max of the function f(x)=13-20x-x²-3x⁴ Please Explain how you found these