Question

Eudora ran from her home to her secret laboratory at an average speed of 12 km/h. She then took one of her jetpacks and flew to her school at an average speed of 76 km/h. Eudora traveled a total distance of 120 kilometers, and the entire trip took 2 hours.

How long did Eudora spend running, and how long did she spend flying using her jetpack?

Answer 1

Answer:

The answer is 1.5 hours with jetpack.

Step-by-step explanation:

Suppose "n"represents the time Eudora used her jetpack.

Then

76n+12(2-n) = 120

76n + 24 - 12n = 120

76n - 12n = 120 - 24

64n=96

n = 96/64 = 1.5 hours with the jetpack, and spent .5 hours running.

Answer 2

Answer:

Eudora spent about 1.5 hours in flying with jetpack and she spent 0.5 hours in running.

Given:

Eudora ran from her home to her secret laboratory at an average speed of 12 km/h. She then took one of her jetpacks and flew to her school at an average speed of 76 km/h. Eudora traveled a total distance of 120 kilometers, and the entire trip took 2 hours.

To find:

How long did Eudora spend running, and how long did she spend flying using her jet pack

Solution:

Let x be the amount of time she used jet pack,

76x + 12 (2-x) = 120

76x + 24 – 12x = 120

$x= \frac{96}{64}$

x= 1.5

On simplifying, we get x = 1.5 hours, and she spent 0.5 hours on running.

Learn more about finding time:

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