Someone Mysterious

This page lists questions and answers that were posted by visitors named Someone Mysterious.

Questions

The following questions were asked by visitors named Someone Mysterious.

Answers

The following answers were posted by visitors named Someone Mysterious.

Speed= distance/time. At 40km/h you will take 3/4 hours to do 30km. At 60 km you will take 1/2 hours. So, the total time is 3/4 + 1/2 = 1 and 1/4. Hence you will travel 60km in 1 and 1/4 hours => average speed = 6/1 and 1/4= 60x4/5 = 48km. So, the answer...