Susan drove an average speed of 30 miles per hour for the first 30 miles of a trip & then at a average speed of 60 miles/hr for the remaining 30 miles of the trip if she made no stops during the trip what was susan's avg speed in miles/hr for the entire trip.(a) 35(b) 40(c) 45(d) 50(e) 55

The correct option is B.

Step-by-step explanation:

It is given that Susan drove an average speed of 30 miles per hour for the first 30 miles of a trip & then at a average speed of 60 miles/hr for the remaining 30 miles of the trip.

Time taken by Susan in first 30 miles is

Time taken by Susan in remaining 30 miles is

Total distance covered by Susan is

Total time taken by susan to complete 60 miles trip is

Susan's avg speed in miles/hr for the entire trip is

The average speed of susan for entire trip is 40. Therefore the correct option is B.

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step-by-step explanation:

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