2. Questions Bank
  3. 8th Class
  4. Mathematics
  5. Direct and Inverse Proportions

8th Class Mathematics Direct and Inverse Proportions Question Bank Direct and Inverse Proportions

  • question_answer
    A car takes one hour to cover a certain distance at\[60\text{ }km/h\]. How long will the same journey take at \[80\text{ }km/h\]?

    A)  45 minutes                        

    B)  2 hours               

    C)         90 minutes        

    D)         3 hours

    Correct Answer: A

    Solution :

    A car takes one hour to cover a certain distance at\[~60\text{ }km/h\].               \[\Rightarrow \] Distance covered\[=60\text{ }km\]             Let the required time be x h. Speed of the car and the time taken to travel a distance are inversely proportional. \[\therefore \] \[60:80\,\,:\,\,:\,\,x:1\] \[\Rightarrow \]               \[x=\frac{60}{80}=\frac{3}{4}\] hour = 45 minutes


You need to login to perform this action.
You will be redirected in 3 sec spinner