noelle walks from point a to point b at an average speed of 3 kilometers per hour. at what speed, in kilometers per hour, must noelle walk from point b to point a so that her average speed for the entire trip is 4 kilometers per hour?
Choose the correct choice from the following answers:
A) 5.75 B) 6 C) 7.25 D) 7.5 E) 7.75
<gadget id="calculator">4 * 3</gadget>
<output>12</output>

<gadget id="calculator">2 * 3</gadget>
<output>6</output>

<gadget id="calculator">6 - 4</gadget>
<output>2</output>

<gadget id="calculator">12 / 2</gadget>
<output>6</output>

<result>B</result>
noelle walks from point a to point b at an average speed of 3 kilometers per hour. at what speed, in kilometers per hour, must noelle walk from point b to point a so that her average speed for the entire trip is 4 kilometers per hour?
divide(multiply(4, 3), subtract(multiply(const_2, 3), 4))
"let ' s suppose that speed while returning was xkm / h since the distance is same , we can apply the formula of avg speed avg speed = 2 s 1 s 2 / s 1 + s 2 4 = 2 * 3 * x / 3 + x x = 6 b is the answer"