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You and a friend plan to meet in San Francisco for a Giants game. The ballpark is 49 miles from your house in San Jose. With traffic, your average driving speed from start to finish is 50 miles per hour. Your friend lives in Mountain View which is 40 miles from the ballpark and he plans to drive separately. You can assume that traffic is roughly the same for your friend so that his average driving speed is also 50 miles per hour. How long does it take you to drive from your house to the ballpark? If you leave at 4pm, what time should your friend leave in order to arrive at the exact same time you do?

Question

You and a friend plan to meet in San Francisco for a Giants game. The ballpark is 49 miles from your house in San Jose. With traffic, your average driving speed from start to finish is 50 miles per hour. Your friend lives in Mountain View which is 40 miles from the ballpark and he plans to drive separately. You can assume that traffic is roughly the same for your friend so that his average driving speed is also 50 miles per hour. How long does it take you to drive from your house to the ballpark? If you leave at 4pm, what time should your friend leave in order to arrive at the exact same time you do?

check_circleAnswer
Step 1

My speed is 50mph  and I have to cover 49 miles.

Answer: It will take 58 minutes 48 seconds for me.

timedistance
speed
49
time
-hour
50
49
time x60 minute
50
time 58.8 minute
time 58 minute (0.8x60) seconds
time 58 minute 48 seconds
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timedistance speed 49 time -hour 50 49 time x60 minute 50 time 58.8 minute time 58 minute (0.8x60) seconds time 58 minute 48 seconds

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Step 2

I leave at 4 pm.

So I will reach at (4...

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