sondenso wrote:

It took the bus 4 hours to get from town A to town B. What was the average speed of the bus for the trip?

1.In the first 2 hours the bus covered 100 miles

2.The average speed of the bus for the first half of the distance was twice its speed for the second half

Sorry, may I ask this question that I always confused when facing: for statement2 :fist speed = 2 second speed OR 2 first speed = second speed. Thanks!

I got the answer - E

1st stmnt alone => not sufficient - since it does not talk about disstance covered in last 2 hrs.

2nd stmnt alone => not sufficient - since it does not give distance and total time. We can still find the avg speed in terms of 'x' from this, where x = avg speed in second half of the travel

Both stmnt together => not sufficient - since 1. talks about first half in terms of time and 2. talks about 1st half in terms of distance.

Cumic