# An althlets completes one round of a circular track of diameter 200m in 40sec .what will be the distance covered and the displacement al the end of 2min and 20 sec

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no.of rounds completed in 140s=(140/40)=3.5

distance traveled=3.5 * circumference of circle

3.5*2πr=3.5*22/7*200=2200m

The athlete completes 3.5 rounds of the circle. The displacement after 3 rounds will become zero as the athlete has reached its initial position. So the 0.5 round is the diameter traveled by the athlete.

So, displacement=200m

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IF WE TAKE A CIRCLE THE DIAMETER DIVIDES THE CIRCLE INTO TWO EQUAL PARTS.THERE FOR ONE TIP OF THE DIAMETER CAN BE MARKED AS POINT __A__* AND THE OTHER AS B.*

NOW THE DIAMETER IS 200m

TIME TAKEN IS 40s

2min AND 20s CAN ALSO BE WRITTEN AS 2x60+20=140s

THEREFORE THE HE WILL BE ABLE TO GO THREE TIMES ABOUT THE CI9RCLE i.e FROM A TO B .THEN AFTER 20 MORE SEC HE WIL BE AT POINT B ,SO THE DISPLACEMENT HERE WILL BE THE DIAMETER 200m

and the total distance travelled will be3x2 pi r+pi r =2200m distance travelled

hope u understand the pi r ,sorry it could not be written in the sign form

hope this answer helped u buddy......

NOW THE DIAMETER IS 200m

TIME TAKEN IS 40s

2min AND 20s CAN ALSO BE WRITTEN AS 2x60+20=140s

THEREFORE THE HE WILL BE ABLE TO GO THREE TIMES ABOUT THE CI9RCLE i.e FROM A TO B .THEN AFTER 20 MORE SEC HE WIL BE AT POINT B ,SO THE DISPLACEMENT HERE WILL BE THE DIAMETER 200m

and the total distance travelled will be3x2 pi r+pi r =2200m distance travelled

hope u understand the pi r ,sorry it could not be written in the sign form

hope this answer helped u buddy......