Question:- Excluding halts, the speed of a bus is 60 km/h and including halts, speed is 42 km/h. For how many minutes does the bus stop per hour?
A. 18
B. 20
C. 60
D. 40
Answer:-
Given,
- speed of a bus excluding halts= 60km/h
- speed of a bus including halts= 42km/h
Using formula,
[(fast speed - slow speed)/fast speed] X 60
Calculation,
- [(60-42)/60] X 60
- (18/60) X 60
- 18 minutes per hour
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