An athlete crosses a distance of 1800 m in 12 minutes. What is his speed in km per hour?

Correct option is B

Given:

Distance =1800 m

Time taken by athlete =12min

Formula Used:

Speed = $$\ \frac{Distance}{Time}$$​​

Solution:

Time taken  =$$12\times 60$$​= 720sec

Speed  = $$\frac{1800}{720} = 2.5\ m/sec$$​​

Speed in km/hr = $$2.5 \times \frac{18}{5} = \bf 9 \ km/hr$$​​