Question
A person walks at 5 km/h and needs to reach home in 2
hours. After walking half the distance, they rest for 20 minutes. What must be their speed for the remaining distance to be on time?Solution
Total distance = 5 × 2 = 10 km
Time for half journey = (5 ÷ 5) × 60 = 60 minutes
Time remaining = 120 – 60 – 20 = 40 minutes
Required speed = (5 ÷ 40) × 60 = 7.5 km/h
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