A body travels 12 cm in the first two seconds and 24 cm in the next four seconds. What is the average speed of the body for the entire journey?

5 cm/s

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6 cm/s

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7 cm/s

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8 cm/s

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Solution

The correct option is B
6 cm/s

Total distance travelled = 12+24 =36 cm

Total time taken= 2 + 4 = 6 sec

Average speed = $\frac{t o t a l d i s t a n c e t r a v e l l e d}{t o t a l t i m e} = \frac{36}{6} = 6 c m / s$

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