Kevin drove his scooter 62 km in 2 h. How do you find how far he drives if he drives at the same rate of 3 hr?

1 Answer
Nov 21, 2016

Answer:

#93\text( km)# driven

Explanation:

information given

  • 62 km driven in 2 h
  • driving same rate in 3 h

application
If Kevin drives 62 km in 2 h, then #(62\text(km))/(2\text(h))=(31\text(km))/\text(h)# is his rate.

calculation

  • apply dimensional analysis with conversion factor #(31\text(km))/(1\text(h))#
    #3h\times(31\text( km))/(1\text( h))#
  • numerator's and denominator's units cancel out
    #3\cancel(\text(h))\times(31\text(km))/(1\cancel(\text(h)))#
  • multiply results
    #(3\times31\text(km))/1=(93\text(km))/1=93\text(km)# driven