Question

Kadri travels a distance of 48 km. Find how long he will take if: a) he walk the distance at 5 km/h.b) he rides on a bike at 60 km/h.c) he drives a car at 100 km/h.

Answer 1

Answer:

a. It will take 9.6 hrs or 9 hrs and 36 minutes.

b. It will take 0.8 hrs or 48 minutes.

c. It will take 0.48 hrs or 28 minutes and 48 seconds.

Explanation:

a. To determine the time it takes, divide the distance 48 km by the rate.

$48km\div\frac{5km}{hr}=9.6hrs$

To determine the exact minute, multiply the decimal 0.6 by 60 minutes.

$0.6hrs\times\frac{60min}{hr}=36mins$

Hence, it will take 9 hrs and 36 minutes to walk 48km at a rate of 5km/hr.

b. Similar to the solution above, divide 48 km by the rate of 60 km/hr.

$48km\div\frac{60km}{hr}=0.8hrs$

Multiply 0.8 hrs by 60 mins.

$0.8hrs\times\frac{60min}{hr}=48mins$

Hence, it will take 48 minutes to travel the distance of 48 km on a bike at 60km/hr.

c. Lastly, divide 48 km by the speed of the car 100km/hr

$48km\div\frac{100km}{hr}=0.48hrs$

Multiply 0.48 hr by 60 mins.

$0.48hrs\times\frac{60mins}{1hr}=28.8mins$

To determine the exact seconds, multiply the decimal 0.8 mins by 60 seconds.

$0.8mins\times\frac{60sec}{min}=48seconds$

Hence, it will take 28 mins and 48 seconds to travel a distance of 48 km in a car at a speed of 100km/hr.