Question

Emily and Kylie are 140 miles apart, traveling towards each other. If Kylie travels 12 mph and Emily travels 8 mph how long until they meet?

Answer 1

Answer: 7 hr

Explanation:

Given

Distance between Emily and Kylie is
`140\ \text{miles}`

Speed of Emily
`v_e=12\ mph`

Speed of Kylie
`v_k=8\ mph`

Distance traveled by Emily
`\Rightarrow d_e=12t`

Distance traveled by Kylie
`\Rightarrow d_k=8t`

`\Rightarrow 12t+8t=140\\\Rightarrow 20t=140\\\Rightarrow t=7\ hr`

They will meet after 7 hour.