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WE:Education (Education)
Re: Janice left her home at 11 a.m., traveling along Route 1 at
[#permalink]
12 Feb 2021, 11:51
Use the concept of Relative Velocity
At 1:00 PM
Janice must have covered 60 miles in 2 hours ...... (from 11:00 AM to 1:00 PM at a speed of 30 mph)
Her brother starts chasing her at 45 - 30 = 15 mph
So, \(time required = \frac{60}{15} = 4 hours\)
Add 4 hours to 1:00 PM, that will be 5:00 PM
Hence, option E