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Kruka [31]
2 years ago
8

2. A car traveled 240 km in 3 hours. What was its average speed in km per hour?​

Physics
2 answers:
vekshin12 years ago
8 0

Answer:

80 km

Explanation:

Since 240 divided by three is 80, the velocity the car is traveling at is 80 kilometers per hour.

jek_recluse [69]2 years ago
7 0
Answer is 80
Step by step
240 divided by 3
Which is 80 km per hour
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Explanation:

It is given that,

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The negative sign indicates that x and y are decreasing.

We have to find \frac{dz}{dt}. Equation for the given variables according to the Pythagoras theorem is as follows.

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        2z\frac{dz}{dt} = 2x\frac{dx}{dt} + 2y\frac{dy}{dt}

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So, when x = 4 mi, and y = 3 mi then z = 5 mi.

As,       \frac{dz}{dt} = \frac{1}{z}(x\frac{dx}{dt} + y\frac{dy}{dt})

                       = \frac{1}{5}(4 \times (-40) + 3 \times (-40))

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                       = 52

Thus, we can conclude that the cars are approaching at a rate of 52 mi/h.

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