Mary jogs 9 km at a speed of 6 km per hour. At what speed would she need to jog during the next 1.5 hours to have an average of 9 km per hour for the entire jogging session ?

Mary jogs 9 km at a speed of 6 km per hour. At what speed would she ne

1.	Mary jogs 9 km at a speed of 6 km per hour. At what speed would she need to jog during the next 1.5 hours to have an average of 9 km per hour for the entire jogging session ?
A.	kmph
B.	0 kmph
C.	2 kmph
D.	4 kmph
Answer» D. 4 kmph

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Mary jogs 9 km at a speed of 6 km per hour. At what speed would she need to jog during the next 1.5 hours to have an average of 9 km per hour for the entire jogging session ?

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