Math

posted by .

A man runs to a telephone and back in 15 minutes. His speed on the way to telephone is 15 m/s and his speed on the way back is 4m/s. Find the distance to the telephone.

  • Math -

    let the time one way be t seconds, then the time the other way has to be 900-t seconds. (15 x 60 seconds = 900 seconds)

    distance one way = 15t
    distance the other way = 4(900-t)

    same distance either way, so
    15t = 4(900-t)
    19t = 3600
    t = 3600/19

    distance = 15(3600/19) m or 2842.1 m or appr 2.84 km

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. English

    How can I e-mail to America Online? If you are trying to cancel the service, you cant. You have to telephone, often several numbers. The easier way is to just have your credit card service refuse payment. If it is another matter, telephone
  2. physics

    a telephone engineer feeds a sound signal into the mouthpiece of a telephone.As part of the tests he is making he incresesthe frequency of the sound.HOW WILL THIS EFFECT TYE ELECTICAL SIGNAL PASSING ALONG THE TELEPHONE WIRE?
  3. Statistics

    A set of telephone lines is to be installed so as to connect between town A and town B. The town A has 2000 telephones. If each of the telephone users of A were to be guaranteed instant access to make calls to B, 2000 telephone lines …
  4. math (unanswered, previously posted)

    A set of telephone lines is to be installed so as to connect between town A and town B. The town A has 2000 telephones. If each of the telephone users of A were to be guaranteed instant access to make calls to B, 2000 telephone lines …
  5. Statistics

    if it can be assumed that 39.5% of all telephone #'s are unlisted, and that all telephone #'s are independent,find the probability that at least 1 of 5 telephone numbers are listed.
  6. math

    the annual household cost of telephone service in the US increased at a relatively constant rate of $27.80 per year from 1981 to 2001. in 2001 the annual household cost of telephone service was $914. a: what was the annual household …
  7. math

    the annual household cost of telephone service in the US increased at a relatively constant rate of $27.80 per year from 1981 to 2001. in 2001 the annual household cost of telephone service was $914. a: what was the annual household …
  8. math

    Telephone company A charges $3.00 for the first minute of any long distance call and $0.50 for each additional minute. Telephone company B charges $2.00 for the first minute of any long distance call and $0.70 for each additional minute. …
  9. Math

    The cost of a telephone call is $0.75 + $0.25 ties the number of minutes. Write an algebraic expression that models the cost of a telephone call that lasts t minutes.
  10. math

    the Ace telephone Co. charges a flat monthly frr of $22.00 for a telephone line and $0.20 per minute for long distance calls. a.if you make 25 minutes of long distance calls per month,what will it cost?

More Similar Questions