When a new bridge is built, the average time taken by a car to travel from one city to another is reduced from 1 hour to 30 minutes. What is the percentage decrease in time taken to travel between two cities?
1) 10%
2) 20%
3) 45%
4) 50%
Answers
Answer:
50%
Step-by-step explanation:
1 hour = 60 min
Decrease in time time = (60 - 30) min. = 30 min.
Percentage decrease = 30/60 × 100% = 50%
Given : When a new bridge is built, the average time taken by a car to travel from one city to another is reduced from 1 hour to 30 minutes.
To Find : The percentage decrease in time taken to travel between two cities?
1) 10%
2) 20%
3) 45%
4) 50%
Solution:
Time reduced from 1 hour to 30 minutes.
Earlier Time = 1 hr = 60 minutes
Reduced Time = 30 minutes
Reduction in time = 60 - 30 = 30 minutes
percentage decrease in time taken to travel between two cities
= (30/60) *100
= 50
the percentage decrease in time taken to travel between two cities is 50 %
Correct option is 4) 50 %
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