A cyclist rides for 2 hours at 15 km/hr and then for 3 hours at 20 km/hr. What is the average speed (in km/hr) of the cyclist for the entire trip?A18B16C20D19Answer: A. 18 Read Explanation: Average speed = Total distance ÷ Total timeDistance covered:First part: (15×2=30)( 15 \times 2 = 30 )(15×2=30) kmSecond part: (20×3=60)( 20 \times 3 = 60 ) (20×3=60)kmTotal distance = ( 30 + 60 = 90 ) kmTotal time = ( 2 + 3 = 5 ) hoursAverage speed = (905=18)( \frac{90}{5} = 18 ) (590=18)km/hrAnswer: 18 km/hr Read more in App