A bus covers a distance of 30 km in 36 minutes. If its speed is decreased by…
2021
A bus covers a distance of 30 km in 36 minutes. If its speed is decreased by 10 km/hr, then what will be the time taken by it to cover the same distance?
Answer: D. 45 minutes — Distance = 30 km and time taken initially = 36 minutes = 36/60 hour = 3/5 hour. Initial speed = Distance/Time = 30 ÷ (3/5) = 50 km/hr. Reduced speed = 50 - 10…
- A.
75 minutes
- B.
30 minutes
- C.
60 minutes
- D.
45 minutes
Attempted by 82 students.
Show answer & explanation
Correct answer: D
Distance = 30 km and time taken initially = 36 minutes = 36/60 hour = 3/5 hour.
Initial speed = Distance/Time = 30 ÷ (3/5) = 50 km/hr.
Reduced speed = 50 - 10 = 40 km/hr.
Time to cover 30 km at 40 km/hr = 30/40 hour = 3/4 hour = 45 minutes.
Therefore, the correct answer is 45 minutes.
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