On a 60 km stretch of road a cyclist travels first 20 km at a uniform speed of 20km/hr. How fast he must travel the remaining distance so that his average speed is 10 km/hr for the entire trip.
Answer is given 8 km/hr.. But i want the complete process to do this question.
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first of all we need to find the total time under which we can cover the whole distance is come out to be as 7.5 hours by the formula average speed is equal to total distance upon time and the time under which he covers 20 km is one hour and let's assume that he covers another 40 kilometre by velocity v as the total time covered by him is equal to 1 + 40 /v= 7.5 . on solving father the value of v comes out to be 6.15km/hr
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