Expert: Ahmed Salami - 8/10/2004

Question
Hello Ahmed,

Will you demonstrate your approach to solve the following question?

**How long would a car travelling at 30 miles per hour take to cover a distance of 44 feet? (i mile = 5,280 feet).**

(A) 1 second
(B) 2.64 seconds
(C) 5.2 seconds
(D) 1 minute
(E) 7.7 minutes  

Answer
Hi Ang-sui,
speed = distance/time
So in this question,
speed = 30miles/hr
distance = 44 feet
but 1 mile = 5280 feet
1 feet = 1/5280 mile
so 44 feet = 44/5280 mile
Now,
Time = distance/speed
    = (44/5280)/30
    = 44/(5280 x 30)
    = 44/158400 hours
    = 44/158400  x 3600 seconds
    = 1 second
Thats it.
Regards.