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Darpan runs a distance of 12 km and then cycles a distance of 26 km. His running speed is x km/h and his cycling speed is 10 km/h faster than his running speed He takes a total time of 2 hours 48 minutes.
(a) An expression for the time, in hours, Darpan takes to run the 12 km is 12/X. Write an equation, in terms of x, for the total time he takes in hours.​
B. show that this equation simplifies to 7x^2 - 25x - 300 = 0

Sagot :

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