At a starting point, a car leaves due to West at a speed of 60 kph, while another car leaves due East at a speed of 80 kph. If both left at exactly 10:00 am, at what time will they be 490 km apart?
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acc. to condition
after 1 hr they would be 140 km apart
so, in x hrs they would be 490 km apart
so, x = 490/140
=7/2 hrs
= 210 mins
they would be at such condition on 1:10pm
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