Question

an athlete complete 800 metre race in 2 minutes find his average speed in metre second​

Answer 1

Given:

An athlete completes 800 metre race in 2 minutes.

To find:

Average speed in m/s unit.

Calculation:

Average speed is calculated from the ratio of Total distance travelled to the the total time taken to cover that specified distance.

$\sf{avg. \: v = \dfrac{total \: distance}{total \: time} }$

$\sf{ = > avg. \: v = \dfrac{800 \: m}{2 \: min} }$

$\sf{ = > avg. \: v = \dfrac{800 \: m}{2 \times 60 \: sec} }$

$\sf{ = > avg. \: v = \dfrac{80 \cancel0 \: m}{2 \times 6 \cancel0 \: sec} }$

$\sf{ = > avg. \: v = \dfrac{80 }{12}}$

$\sf{ = > avg. \: v = 6.67 \: m {s}^{ - 1} }$

So , final answer is:

$\boxed{ \bold{ \large{ \red{ avg. \: v = 6.67\: m {s}^{ - 1} }}}}$

Answer 2

Average speed

Given: An athlete completes 800 metre race in 2 minutes.

To find: The average speed of the athlete in metre / second.

Solution:

To obtain average speed of the race, we divide the total path by the time taken.

• Total path = 800 metre
• Time = 2 minutes = 2 * 60 seconds = 120 seconds

Thus average speed of the athletics is

= 800/120 m/s

= 80/12 m/s

= 20/3 m/s

= 6.666... m/s

= 6.67 m/s (approximately)

Answer: The average speed of the athlete is 6.67 m/s .