Find the dimensions of the rectangle of largest area that can be inscribed in a circle of radius r.

Step-by-step explanation:

Given that a rectangle is inscribed in a circle of radius r.

Since diameter subtends right angle at the circumference we get diagonal of the rectangle is diameter of the circle

Let l and w be the dimensions

Then

Hence A =lw maximum when A square is maximum

i.e.

Use derivative test

I derivative =

II derivative <0 for non zero value of l

Hence maximum when

Or rectangle is a square with equal sides

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if you're asking about your rank, it depends on having a certain number of points and a certain number of brainliest answers. for example, at the time of this writing, i have 44338 points out of 15000 needed for the next (nearly triple the requirement! ) but i only have 24 out of 50 required brainliest answers. this number decays, meaning after a certain amount of time (i think about a month), the total number of brainliest answers you've earned doesn't count toward this total. (i've been stuck at the same rank for a long

the lesson to learn here is that you shouldn't worry about points or rank. chances are, no matter how good an answer you may provide, your efforts will go mostly unnoticed unless you focus on the newest/most active questions that get posted.

i need more info. are you looked to see there mph? how much they deliver? how far they go?

step-by-step explanation: