Find the exact length of the curve. Use a graph to determine the parameter interval.

1 answer:

4 0

The formula for the length of a polar curve is∫r2+(dr/dθ)2 from a to b.

In this case, dr/dθ is the derivative of the function r which is equal to -cos (theta/2) * sin (theta/2) which is equal to -1/2 cos theta. Since there are no limits defined, we leave the formula as it is but one can use the calculator if there are limits present already

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Step-by-step explanation:

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While traveling to the office, dolly drives her car at a speed of 60 kmph and then suddenly the car stopped on half of her dista

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The average speed of Dolly is 33.33kmph.

Average Speed:

The average speed is defined as the total distance travelled by the object in a particular interval of time. It can be calculated by dividing the total distance travelled by the total time taken.

So, Average Speed = total distance / total time

Here,

Let the total distance is 100 km.

Therefore, consider she will travel 60 km at speed of 60 kmph , 30 km at speed of 30 kmph and 10 km at speed of 10 kmph.

she will required times of 1 hour, 1hour and 1hour

So,

Average speed = 100 / (1 + 1 + 1)

=> 100 / 3 = 33.33

To know more about Average speed here

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