Question
In a 20 km race, A, B, and C are running at constant
speeds. If A finishes the race 4 km ahead of B, and B finishes 4 km ahead of C, by how many meters does A beat C?Solution
When βAβ covers 20 km, βBβ will cover 16 km Similarly, when βBβ covers 20 km, βCβ covers 16 km Therefore, when βBβ covers 16 km, then βCβ will cover = (16 Γ 16)/20 = 12.8 km Therefore, βAβ will beat βCβ by = 20 β 12.8 = 7.2 km
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