Question

Leo is running in a 5-kilometer race along a straight path. if he is at the midpoint of the path, how many kilometers does he have left to run?

Answer 1

Let us assume Leo starts from a point (0,0)

Since the total length of the race is 5 km, he will be at (5,0) at the end of the race.

It is given that, he is at the mid point of the race.

Mid point formula is :
`((x_(1) +x_(2) ))/(2) , ((y_(1) +y_(2) ))/(2)`

Present coordinate :
`(5+0)/(2) , (0+0)/(2) = (2.5,0)`

He still needs to run 5-2.5 = 2.5 km