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22 Jan 2023, 13:51
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A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
80% (02:13) correct
20%
(02:41)
wrong
based on 83
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Q. If John travels to his school from his home at 2 km/hr he will be 15 minutes late. If he travels at 5 km/hr he will be 30 minutes early. Find the distance from his home to the school.
(a) 2.5 km
(b) 3 Km
(c) 4 Km
(d) 3.5 km
(e) 4.5 Km
(a) 2.5 km
(b) 3 Km
(c) 4 Km
(d) 3.5 km
(e) 4.5 Km
Archit3110
Major Poster
22 Jan 2023, 21:50
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Solve for t from given info
2(t+15/60) = 5(t-15/60)
(4t+1)=5(2t-1)
4t+1=10t-5
6=6t
T=1
Substitute t value in
2(5/4)
2.5 km
Option A
Posted from my mobile device
2(t+15/60) = 5(t-15/60)
(4t+1)=5(2t-1)
4t+1=10t-5
6=6t
T=1
Substitute t value in
2(5/4)
2.5 km
Option A
Mahaprasad711
Posted from my mobile device
23 Jan 2023, 09:09
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[quote="Archit3110"]Solve for t from given info
2(t+15/60) = 5(t-15/60)
(4t+1)=5(2t-1)
4t+1=10t-5
6=6t
T=1
Substitute t value in
2(5/4)
2.5 km
Option A
here is an error.
2(t+15/60) = 5(t-15/60)
5(t-15/60) should be 5(t-30/60) because he is 30 mins early.
2(t+15/60) = 5(t-15/60)
(4t+1)=5(2t-1)
4t+1=10t-5
6=6t
T=1
Substitute t value in
2(5/4)
2.5 km
Option A
here is an error.
2(t+15/60) = 5(t-15/60)
5(t-15/60) should be 5(t-30/60) because he is 30 mins early.
