Priya cycles from her home to Bedok Reservoir, a distance of 6 km, at 12 km/h. She returns by the same route at 8 km/h. What is her average speed for the whole journey?
Show Worked Solution
Worked Solution
Step 1: Total distance = 6 + 6 = 12 km.
Step 2: Time going = 6 ÷ 12 = 0.5 h.
Step 3: Time returning = 6 ÷ 8 = 0.75 h.
Step 4: Total time = 0.5 + 0.75 = 1.25 h.
Step 5: Average speed = 12 ÷ 1.25 = 9.6 km/h.
Answer: 9.6 km/h
Correct answer: 9.6 km/h
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