A car was driving at 60 Km/h for 20 minutes, and then at 90Km/h for another 40 minutes. What was its average speed?
Choose the correct choice from the following choices
A) 80.  B) 75  C) 70  D) 65.  E) 54.
driving at 60 Km/h for 20 minutes ,distance covered = 60*1/3= 
<gadget id="calculator">60*1/3</gadget>
<output>20</output>
20 km   driving at 90 km/h for 40 minutes ,distance covered= 90*2/3= 
<gadget id="calculator">90*2/3</gadget>
<output>60</output>
60 km   average speed= total distance/total time = 80/1= 
<gadget id="calculator">80/1</gadget>
<output>80</output>
80 km/h   80.NSWER:80.
<result>A</result>
A car was driving at 60 Km/h for 20 minutes, and then at 90Km/h for another 40 minutes. What was its average speed?