1.

In the qualifyingrounds for a race, Rustyand Datedrivetheifcarsaround a 6,000 - footovaltrack. Rustyand Daleeachdrive 8 lapsin thequalifyingroundsin lanesofidenticallength . on dayoneof thequalifyingrounds, RustyandDalestart fromthe samepoint , buttheircarsarereversedandeachdrivesoppositeways, Rustydrivesat a constantspeedthatis 8 feetper secondfasterthandale's constantspeedRustypassesDalefor thefirsttimein 150seconds . Rustydrivesat aconstant rateofhowmanyfeetpersecond ?

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Answer :B


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