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. About the author Amelia

Answer: Average speed = Total distance ÷ Total time = 10+5+5÷10+5+5 =20÷20 = 1 Average speed = 1km/min . Reply

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 Reply

Answer:Average speed = Total distance ÷ Total time

Average speed = 1km/min .

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