waec model questions vol1 2023 mathematics
Objective • Question 25
Question 25
WAEC_MODEL_QUESTIONS_VOL1
•
2023
A distance-time graph for a car shows that from t = 0 to t = 4 h the car travels at a constant speed covering 240 km. It then rests for 1 h (no distance covered). After the rest, it travels at another constant speed and reaches a total distance of 560 km at t = 9 h. Determine (a) the speed during the first interval, (b) the speed during the second interval, and (c) the average speed for the whole journey (excluding the rest period).
Answer Options
A.
55, 85, 68
B.
50, 90, 70
C.
60, 70, 65
Correct Answer
D.
60, 80, 70
Correct Answer
D
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