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3 years ago

A car's speedometer has a percent error of 5%. The speedometer currently shows that the car is traveling at a speed of 60 mph.

Mathematics

1 answer:

Minchanka [31]3 years ago

8 0

Answer:

The actual speed of the car is either 57 mph or 63 mph

Step-by-step explanation:

Given as :

The measured speed o the car = 60 mph

The percentage error in speedometer = 5 %

Let The actual speed of car = x mph

Now, percentage error = $\dfrac{\textrm actual value - \textrm measured value}{\textrm measured value}$ × 100

So, $\frac{5}{100}$ = $\frac{x - 60}{60}$

or, $\frac{5}{100}$ × 60 = x - 60

Or, 3 = x - 60

∴ x = 63 mph

Hence The actual speed of the car is either 57 mph or 63 mph . Answer

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$\boxed{ \boxed{\huge{ \mathrm{ \underline{ Answer } ✓ }}}}$

<u>Figure - 1</u> :

Let the missing side as " n "

$\mathrm{ \triangle DEF \sim \triangle DRQ}$

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<u>Figure - 2</u> :

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