Question

Abdul .while driving to school computes the average speed for his trip to be 20 kilometre per hour. on his return trip along the same route there was less traffic and the average speed is 30 kilometre per hour. what is the average speed of Abdul's trip?

Answer 1

Answer:DISTANCE BETWEEN ABDULS SCHOOL CAMPUS AND HOUSE CAN BE TAKEN AS S

AVERAGE SPEED =AVERAGE DISTANCE /AVERAGE TIME

AVERAGE SPEED= S+S/S/20+S/30 =2S/5S/60=2SX60B5S =12

Explanation:

WE GET 5S BECAUSE OF LCM