Question

Question #72449

Answer 1

it would be 32.4 km or 32,400 m

Explanation:

So if the bus moves in straight line with the same speed and no external forces acting on it,

from the formula used in physics `d = u * t`

[ d <- distance , u<- velocity, t <- time]

you would have `d = 40 * ( t + 7 * 60)` [1]
and `d = 36 * ( t + 22*60)` [2]

so you will firstly solve the equation (1) = (2) for t

`40 * ( t + 420 ) = 36 * ( t + 1320)`
`40 * t + 420 * 40 = 36 * t + 1320 * 36`
`4 * t = 47,520 - 16,800`
`4 * t = 30,720`
`t = 7680` seconds or 128 minutes

then choose one equation and replace the time :

`d = 40 * ( 7680 + 7 * 60)`
`d= 40 * ( 7680 + 420)`
`d = 40 * ( 8,100)`
`d = 32,400` m or 32.4 km