ferret35
ferret35
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Let X = velocity of freight train ∴ X + 21 = velocity of express train Let D(f)= distance travelled by freight train Let D(e)= distance travelled by express train Distance = velocity x time D(f) = X x 6 D(e) = (X + 21) x 6 ∵ D(f) + D(e) = 7…
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Let X = velocity of freight train ∴ X + 21 = velocity of express train Let D(f)= distance travelled by freight train Let D(e)= distance travelled by express train Distance = velocity x time D(f) = X x 6 D(e) = (X + 21) x 6 ∵ D(f) + D(e) = 7…