A body covers 10 km in 10 minute next 5 km in 5 minute and next 5 km in 5 minute find the average speed.​

2 thoughts on “A body covers 10 km in 10 minute next 5 km in 5 minute and next 5 km in 5 minute find the average speed.​”

1. Answer:

   Average speed = Total distance ÷ Total time

   • = 10+5+5÷10+5+5
   • =20÷20
   • = 1

   Average speed = 1km/min .

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2. Given : –

   A body covers 10 km in 10 minute next 5 km in 5 minute and next 5 km in 5 minute.

   To find : –

   Average speed of a body

   Solution : –

   In first case

   A body covers 10 km in 10 minute

   1 km = 1000m

   Multiply 10 by 1000 to convert kilometre in meter

   → Distance (D1) = 10 × 1000 = 10000m

   1 min = 60 s

   Multiply 60 by 10 to convert minute in hour

   → Time (t1) = 10 × 60 = 600s

   In second case

   A body covers 5 km in 5 minute

   Distance = 5km

   → Distance (D2) = 5 × 1000 = 5000m

   Time = 5 min

   → Time (t2) = 5 × 60 = 300s

   In third case

   A body covers 5 km in 5 minute

   Distance (D3) = 5000m

   Time (t3) = 300s

   Now,

   As we know that

   → Average speed = Total distance travelled/total time

   → Average speed = D1 + D2 + D3/t1 + t2 + t3

   → Average speed = 10000 + 5000 + 5000/600 + 300 + 300

   → Average speed = 20000/1200

   → Average speed = 16.6 m/s

   Hence,

   Average speed of body is 16.6 m/s

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