A man walks 3 km and 200 metres in 25 minutes. What is his speed (in km/h)?
- A7.86
- B7.68
- C8.76
- D6.87
Solution & Step-by-step Explanation
Convert the total distance into kilometers:
Distance=3km+
1000
200
km=3+0.2=3.2km
Convert the time duration from minutes into hours:
Time=
60
25
hours=
12
5
hours
The formula for speed is:
Speed=
Time
Distance
Speed=
12
5
3.2
=3.2×
5
12
=
5
38.4
=7.68km/h
Distance=3km+
1000
200
km=3+0.2=3.2km
Convert the time duration from minutes into hours:
Time=
60
25
hours=
12
5
hours
The formula for speed is:
Speed=
Time
Distance
Speed=
12
5
3.2
=3.2×
5
12
=
5
38.4
=7.68km/h