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Aptitude day 264

Answers of Day 263: 1. 250 m.
                                        2. 1: 8.

Problems on Time and Distance:

1. The ratio between the speeds of 2 trains is 2:3. If the 2nd train runs 600 km/hr in 6 hours, then the speed of the 1st train is:

Solution:
                  3x = 600/6 = 33.3.
                  The speed of the 1st train = 2x
                                                           = 66.6 km/hr.

2. A train travels at an average of 10 miles per hour for 3(1/2) hours and then travels at a speed of 30 miles per hour for 4(1/2) hours. How far did the train travel in the entire 8 hours?

Solution:
                  Distance = 10*3(1/2) + 30*4(1/2)
                                  = 10*(7/2) + 30*(9/2)
                                  = 170 miles.


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