Abicyclist was going from point a to point b with a speed of 12 km/h. on the way back he increased his speed to 18 km/h and covered the distance in 15 minutes less. what is the distance between point a and point b?

The distance traveled by the certain object is the product of its speed and the time it traveled. Mathematically,

          D = st
where s is the speed,and t is the time. Substituting the known values,

      D = 12(x)

where x is the time in minutes. 
   
     D = 18(x - 15)

Equating the terms,

     12(x) = 18(x - 15)

The value of x from the equation is 45 minutes or 0.75 hour.

   D = (12 km/h)(0.75 h)
    D = 9 km

9 km

It is 6% because if you subtract 69-58=6 so 6% is the answer to your question.