Speed is calculated by the formula below: Distance can also be calculated as speed x time Distance = Speed × Time From the question, the speed =60km∕h 10.45 am to 12.15 pm is 1 hours 30 minutes NOTE: 10.45am−11.45am=1 hour 15 minutes time will be 12 pm Another 15 minutes time will be 12.15 pm Hence time taken is 1 hour 30 minutes Since the speed is in hours, convert the minutes ( 30 minutes) to hours 60 minutes =1 hour 30 goes into 60, 2 times Now add the 1∕2 hours to the other 1 hour to get the total hours Every number is being divided by 1 Rewrite the fractions Express it in single fraction Divide by the L.C.M of the denominators (1 and 2) The L.C.M of 1 and 2 is 2 Substite the time into the distance equation Cancel out 2 goes into 60, 30 times Distance =30×3km=90km