Question

How many minutes will to drive to Los Angeles from San Francisco if an average speed of 72 mi/hr is maintained?

The distance between the two cities is 405 miles.

Answer 1

It wll take `320` minutes to drive to Los Angeles from San Francisco.

Explanation:

Distance by road between Los Angeles and San Francisco using
I-5 N is `383` miles.

As the average speed is `72` miles per hour,

it will take `383/72=5 23/72` hours

`5` hours is `5xx60=300` minutes and `23/72` hours is `23/72xx60=23/cancel72^6xxcancel60^5=115/6` or `19.17` minutes

i.e. a total of `319.17` or say about `320` minutes.

Hence, it wll take `320` minutes to drive to Los Angeles from San Francisco.