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# Dariella walks x km at 5km/h and then runs (x+4) km at 10 km/h. the average speed of the journey is 7 km/h. find the value of x

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Find the sum of the first 200terms of a. p whose first term is 7and 200ťh term is 393 ?

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Anumber when divided by 4 gives a remainder 1. what will be the remainder if square of the number is divided by 2?

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Avector f is along the positive x axis . if its vector product with another vector f2 is zero then f2 could be

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Dariella walks x km at 5km/h and then runs (x+4) km at 10 km/h. the average speed of the journey is...

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