1.

Body covers circular path of radius r in 20 seconds. calculate distance and displacement after 70 sec

Answer»

ʜᴇʟʟᴏ ᴍᴀᴛᴇ!

Let the body present at point A.

It COVERS whole park in 20s

In 20s it take = 1 round

In 1s it take = 1/20 round

In 70s take = 70/20 or 3.5 round.

Now, from moving point A, take ONE round, then the other and one more round and then a HALF round (.5 )

Here, you will stop at point B

On joining a kine we get a diameter.

As given radius was "R"

So, diameter or here displacement will be "2r"

Hope it helps



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