9. A body moving along straight line covers a distancein three equal p

1.	9. A body moving along straight line covers a distancein three equal parts with speed 2 m/s, 3 m/s and4 m/s, then its average speed is(1) 12 m/s
Answer» ANSWER: (3X +40)+(x-20)=180 3x+40+ x-20=180 4x+20=180 4x=180-20 x=160/4=40

9. A body moving along straight line covers a distancein three equal parts with speed 2 m/s, 3 m/s and4 m/s, then its average speed is(1) 12 m/s

Answer»

ANSWER:

(3X +40)+(x-20)=180

3x+40+ x-20=180

4x+20=180

4x=180-20

x=160/4=40

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9. A body moving along straight line covers a distancein three equal parts with speed 2 m/s, 3 m/s and4 m/s, then its average speed is(1) 12 m/s

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