Flame Institute SCF 18 Near Chawla Lights Phase 7 Mohali Chandigarh 9888949978
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  • Flame SCF 18 Near Chawla Lights Ph-7 Mohali 9888949978

Two people are going along the railway line at a speed of 3 km /h and 6 km/h respectively in the same direction. A train coming from behind them crosses them in 9 seconds and 10seconds respectively. How much the speed of the train?

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