Question

Human walking at 2.5 takes 7 days to get from A to B. Car gets there in 45 minutes. How fast is the car going

Answer 1

The sped of car is 224 miles per hour faster than speed of human

Explanation:

Given as :

The distance cover by human = d = 2.5 miles

The time taken by human to cover distance = t = 7 days

∵ 1 day = 24 hours

∴ 7 days = 7 × 24 = 168 hours

So, Human taken 168 hours to cover distance of 2.5 miles

Let The speed of human = s mi/h

∵ Speed = Distance × time

So, s = 2.5 miles × 168 hour

∴ s = 420 mi/h

So, The speed of human = s = 1.875 mi/h

Again

The time taken by car to cover distance of 2.5 miles = T = 45 minutes

I.e T =
`(45)/(60)` = 0.75 hour

Let The speed of car = s mi/h

∵ Speed = Distance × time

So, S = 2.5 miles × 0.75 hour

∴ S = 1.875 mi/h

So, The speed of car = S = 1.875 mi/h

The speed of car as compare to human

Speed of human = n × speed of car

Or, n =
`(\textrm speed of human)/(\textrm speed of car)`

Or, n =
`(420)/(1.875)`

∴ n = 224

Hence, The sped of car is 224 miles per hour faster than speed of human Answer