Question
Carol walks to work. She walks at an average speed of 5 kilometres per hour. She leaves 3 kilometres away from her workplace. She needs to be at work by 9am. What is the latest she can leave the house?
Ask by Luna Wade. in South Africa
Mar 03,2025
Upstudy AI Solution
Tutor-Verified Answer
Answer
Carol should leave her house by 8:24 am to arrive at work by 9:00 am.
Solution
Carol's walking time is 3 km divided by 5 km/h, which equals 0.6 hours or 36 minutes. To reach work by 9:00 am, she must leave 36 minutes earlier. Therefore, the latest she can leave her house is at 8:24 am.
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Simplify this solution The Deep Dive
To calculate the latest time Carol can leave her house, we first find out how long it takes her to walk 3 kilometres at a speed of 5 kilometres per hour. Time = Distance / Speed = 3 km / 5 km/h = 0.6 hours, which is 36 minutes. Since she needs to be at work by 9 am, we subtract the 36 minutes from 9 am, which means she must leave her house by 8:24 am.
