math

posted by .

at 7:00am joe starts jogging at 6 mi/h. at 7:10 am ken starts after him. how fast must ken run to overtake joe at 7:30am?

If Joe runs at 6 mi/hr for 30 minutes (7:00 to 7:30), his distance traveled is 6 mi/hr x 0.5 hr = 3 miles.
Ken starts at 7:10 and runs until 7:30 for a time of 20 minutes. For Ken to just catch up with Joe in 20 minutes, the rate - distance/time = 3 mi divided by 1/3 Hr =3 x 3/1 = 9 miles/hr. So to overtake Joe, Ken must run one step faster somewhere in the 3 miles.

  • math -

    this is not a valid question

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Math

    Joe and Steve went to the store and Joe had seen this jacket that he had wanted.The jacket costed $12.99 and all Joe had was $10.99. Steve said he would give Joe the extra $2dollars and 59 cent that he would have left out of buying …
  2. Algebra (math)

    At 7:00 am , Joe starts jogging at 6 mi/h. At 7:10 am. Ken starts off after him. How fast must Ken run in order to overtake him at 7:30 am?
  3. math

    joe left a campsite on a trip down the river in a canoe, traveling a 6 km/h. four hours later, joe's father set out after him in a motorboat. The motrboat traveled at 30 km/h. how long after joe's father started did he overtake the …
  4. math

    Jim and Joe were running together. Jim's average speed was 400 meters per minute.Jim started running four minutes before Joe. ten minutes after Joe started, he caught up with Jim. What was Joe's average speed?
  5. physical science

    Joe baked a cake for his mother's birthday. When he removed the cake from the oven, Joe noticed that the cake had not risen. Joe guessed that the baking powder he had used was too old. He designed the following experiment to test his …
  6. Math

    Joe weighs 30 lbs less than twice ken's weight. If ken gains 10 pounds then together they would weigh 250 pounds. How much does each of them weigh?
  7. Math

    Joe weighs 30 lbs less than twice ken's weight. If ken gains 10 pounds then together they would weigh 250 pounds. How much does each of them weigh?
  8. physics

    Joe pushes horizontally on a heavy box across a rough surface at constant speed. Which one of the following statements concerning this situation is false?
  9. Finance

    Patricia and Joe Payne are divorced. The divorce settlement stipulated that Joe pay $520 a month for their daughter Suzanne until she turns 18 in 3 years. Interest is 18% a year. How much must Joe set aside today to meet the settlement?
  10. Algebra

    Richard takes 35 minutes to mow a lawn, but with the help of his friend Joe it only took him 15 minutes. If Joe worked alone, how long would it take Joe to mow the same lawn?

More Similar Questions