Question

If a bottle rotates through 270degreesi in three 3 seconds, how many degrees dose it rotate in 2seconds

Answer 1

It rotates 90degrees in per sencond, so in 2seconds gets 180degrees.

Answer 2

1)
$x^{\circ}$ in 2 seconds 
$\frac{x}{2}=\frac{270^{\circ}}{3}\\\\\frac{x}{2}=\frac{90^{\circ}}{1}\\\\ 1\cdot x = 2\cdot 90^{\circ} \\\\ x = 180^{\circ}$

2)
$270^{\circ}\ : \ 3 = 90^{\circ }$ in 1 second
$2\cdot 90^{\circ}=180^{\circ}$