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a car takes 10 mins to go from A to B, 10km away, it stops for 10 mins to have a flat tyre changed. it then goes from B to C, a further 15km, in yet to another 20 mins. what was the change in speed?​
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a car takes 10 mins to go from A to B, 10km away, it stops for 10 mins to have a flat tyre changed. it then goes from B to C, a further 15km, in yet to another 20 mins. what was the change in speed?​

User Pavelgj
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1 Answer

9 votes

Answer:


\Delta v = 15 km/h

Step-by-step explanation:


v_(1) = (10)/((1)/(6) ) = 60 km/h\\ v_(2) = (15)/((1)/(3) ) = 45 km/h\\\\ \Delta v = v_(1) - v_(2) = 15 km/h

User Matt Varblow
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