Question

Lisa and Jen left home at the same time, only Lisa biked to school at a speed of 10 mph while Jen just walked at a speed of 4 mph. How much time did it take Lisa to get to school if she reached school when Jen still was 1 mile away from it?

Answer 1

Step-by-step explanation: the sender below is not correct

Answer 2

`(1)/(6)` hour or
`10` minutes

Explanation:

Lisa:

Rate = 10 mph

Time = t hours

Distance = x miles

`x=10\cdot t`

Jen:

Rate = 4 mph

Time = t hours

Distance = x - 1 miles

`x-1=4\cdot t`

Hence,

`10t-1=4t\\ \\10t-4t=1\\ \\6t=1\\ \\t=(1)/(6)\ hour`