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eudora ran from her home to her secret laboratory at an average speed of 12\text{ km/h}12 km/h12, start text, space, k, m, slash, h, end text. she then took one of her jetpacks and flew to her school at an average speed of 76\text{ km/h}76 km/h76, start text, space, k, m, slash, h, end text. eudora traveled a total distance of 120120120 kilometers, and the entire trip took 222 hours.

Respuesta :

Eudora spent 0.5 hours from home to library and 1.5 hrs from library to home.

Given,

Home to library, Average speed S₁ = 12 km/hr

Average speed S₂ = 76 km/hr

Total distance = 120 km

Total Time = 2 hrs

Let us take the time taken to go from home to library is x. So, from library to school will be 2-x.

S₁ = 12 km/hr

T₁ = x

S₂ = 76 km/hr

T₂ = 2-x

We know that, distance = speed * time

D₁ = 12x

D₂ = 76(2-x) = 152 - 76x

D₁ + D₂ = 120

12x + 152 - 76x = 120

152 - 64x = 120

64x = 32

x = 0.5 hrs

T₂ = 2-x = 2- 0.5 = 1.5 hrs

To know more about average speed:

https://brainly.com/question/21288829

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