Algebra - Ch. 16: Solving Rate Problems (5 of 11) Rate Problem with Different Approach

We will solve: Tom drove 450 km in the same time as it took Jim to drive 400 km. If Tom's speed was 7km/hr faster than Jim's speed, what was the speed for each?

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[ananthnarayan]

Slightly Alternative one: S1=7+S2; T1=T2; D1=450 Km, D2=400 Km; From formula, S=D/T => S1=450/T1 => 7+S2=450/T1 [1] and S2=400/T2 [2]. Divide [1] and [2] T1 and T2 cancels, then ***S2 = 56 Km/hr*** then S1 = 56+7 => ***S1 = 63 Km/hr***. Hope you guys understand

[ahmedfarid]

thank you, for your huge effort and help :)