Question

hiee❤
a body travels with a speed of 20km/h,40km/h, 60km/h form time 1/2hr, 1/4hr , 1/3hr, 1/4hr . calculate average speed

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Answer 1

Explanation:

You have given half/wrong question.

Answer 2

ANSWER=36.92m/s

EXPLANATION:

• Total Distance travelled By the Car in Given Time

• $speed \times time = </em><em>distance</em></li></ul><p></p><p></p><ul><li><em>$$for \: \frac{1}{2} hr = \frac{1}{2} \times 20 = 10m</em></li></ul><p></p><p></p><p></p><ul><li><em>$$for \: \frac{1}{4} hr = 40 \times \frac{1}{4 } = 10m</em></li></ul><p></p><p></p><p></p><ul><li><em>$$and \: for \: \frac{1}{3} hr = \frac{1}{3} \times 60 = 20m</em></li></ul><p></p><p></p><p></p><ul><li><em>$$total \: distance \: travelled = 10 + 10 + 20 = 40m</em></li></ul><p></p><p></p><p></p><ul><li><em>$$average \: speed = \frac{total \: distance \: travelled}{total \: time \: taken} </em></li></ul><p></p><p></p><p></p><ul><li><em>$$total \: time \: taken = \frac{1}{2} + \frac{1}{4} + \frac{1}{3} = \frac{6 + 3 + 4}{12} </em></li></ul><p></p><p></p><p></p><ul><li><em>$$average \: speed = \frac{distance}{time} = \frac{40 \times 12}{13} </em></li></ul><p></p><p></p><p></p><ul><li><em>$$average \: speed = 36.92m {s}^{ - 1}$