Azhar fitted an electric toy car with hard rubber wheels that had deep treads and placed the car on a smooth, flat surface. Azhar started the car and a stopwatch at the same time. Azhar stopped the stopwatch as the car crossed the 75-foot mark. He calculated the results of 3 separate trials as shown in the table below. Procedure 1
Trial number
Time in seconds
1
8
2
2
3
5
Azhar repeated the procedure, except he fitted the car with soft rubber wheels that were smooth and lacked treads. The results are shown in the table below. Procedure 1
Trial number
Time in seconds
1
0
2
2
3
9
Q-1: What was the average time the car with the soft wheels took to cross the 75-foot mark?
A 22.8 seconds
B 33.9 seconds
C 39.8 seconds
D 56.7 seconds
Solution
Correct Answer: Option D
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