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`        a car travels equal distances with successive speeds of 10, 30, 60 and 20 kilometre per hour to go from one point to another point along a straight line its average speed is`
2 years ago

Vikas TU
8732 Points
```							Let x be the distance in each case.x = 10*t1andx = 30*t2andx = 60*t3andx = 20*t4andt = t1 + t2 + t3 + t4avg. speed = total distance / total time                = 4x/t => 4x/(x/10 + x/30 + x/60 + x/20)                         => 4/((6+2+1+3)/60))                        => 4*60/12                        => 20 Km/hr.
```
2 years ago
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### Course Features

• 110 Video Lectures
• Revision Notes
• Test paper with Video Solution
• Mind Map
• Study Planner
• NCERT Solutions
• Discussion Forum
• Previous Year Exam Questions