Average speed
Algebra
Level
pending
A train travels at a speed of 30 km per hour for 12 minutes and then for the next 8 minutes at a speed of 45 km per hour , then the average speed for the journey is?
38 km/hr
40 km/hr
36 km/hr
37 km/hr
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1 solution
12/20=0.6. 0.6 30+0.4 45=36.