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Stations A and B are 410 km apart. A train leaves A for B at 8:00 AM at 50 km/h, and another leaves B for A at 9:00 AM at 70 km/h. After ho…

1248Medium DSSSB TGT Computer Science 0 replies 1 views

Stations A and B are 410 km apart. A train leaves A for B at 8:00 AM at 50 km/h, and another leaves B for A at 9:00 AM at 70 km/h. After how many hours from 9:00 AM will they meet?

A2.5 hours
B4 hours
C3.5 hours
D3 hours

Correct answer: D

Explanation

By 9:00 AM the first train has covered 50 km, leaving 360 km; at a closing speed of 120 km/h they meet in 360/120 = 3 hours.

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