Billy jogs $2.5 k m$ east in $45$ minutes, takes a water break for $12$ minutes, and then walks west at a rate of $0.65 k m / h$ for $30 m i n$ . What is Billy's average velocity? (Answer units: km/hr)

1.52

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1.96

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2

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1.45

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Solution

The correct option is A $1.52$
Avg. Velocity =Total Displacement /Total Time Taken
Total displacement $= 2.5 - (0.65 \times (30 / 60)) = 2.175 k m$
Total Time Taken $= 45 + 12 + 30 = 87 m i n = 1.45 h o u r s$
So, Average Velocity $= \frac{2.175}{1.45} = 1.52 k m p h$

Hence correct answer is option $A$

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Billy jogs 2.5km east in 45 minutes, takes a water break for 12 minutes, and then walks west at a rate of 0.65km/h for 30min. What is Billy's average velocity? (Answer units: km/hr)

The correct option is A 1.52Avg. Velocity =Total Displacement /Total Time TakenTotal displacement=2.5−(0.65×(30/60))=2.175kmTotal Time Taken =45+12+30=87min=1.45hoursSo, Average Velocity =2.1751.45=1.52kmphHence correct answer is option A

Billy jogs $2.5 k m$ east in $45$ minutes, takes a water break for $12$ minutes, and then walks west at a rate of $0.65 k m / h$ for $30 m i n$ . What is Billy's average velocity? (Answer units: km/hr)