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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

Time=2 min 40 s=140 s 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......