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 Class 8 Mathematics revision: Speed, time and distance questions and answers

Adhiambo left home and cycled for 1#frac{1}{2}# hours at an average speed of 8km/h. She rested for 30 minutes and continued with the journey for 2 hours at an average speed of 7#frac{1}{2}# km/h. What was the average speed for the whole journey?
A. 27km/h
B. 7#frac{5}{7}# km/h
C. 7#frac{3}{4}# km/h
D. 6#frac{3}{4}# km/h

 (6m 27s)
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