Answered

how far will a runner travel if she had an average speed of 10 km/hour and runs for 2.1 hours?



Answer :

10 Km.
S= Speed
D= distance 
T= time

S= d/t
but since you are solving for "d" the equation is d=st so you plug in 10 km/h for speed and 2.1 hours for time and just multiply them. The hours cancel out so you are left with 10km.
um I think you need to multiply 10 km by 2.1