From Chennai Central, one train departs at 9 a.m. at 45 km/h. Two hours later a second train departs from the same station on the same route at 75 km/h. How far from Chennai does the second train catch the first?

Question

Accepted Answer

225 km. Head start = 90 km, closing speed = 30 km/h → 3 h. Second train goes 75×3=225 km. (135 km is the first train's distance in 3 h, ignoring its head start.)

From Chennai Central, one train departs at 9 a.m. at 45 km/h. Two hours later a second train departs from the same station on the same route at 75 km/h. How far from Chennai does the second train catch the first?

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