A particle moving in a straight line travels half time period with speed X m/s and the other half time period in two equal distances with speed 10 m/s and 20 m/s respectively. The average speed of particle during this motion is 30 m/s then the value of X is ?
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Answer: first we will find the average speed that is of 10 metre per second and 20 metre per second which is 15 metre per second now we know the average of 15 metre per second and that of x metre per second which is 30 metre per second so we can find X which is 45m/s
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