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Bob can read 30 pages and Jane can read 40 pages in an hour. Bob start
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17 Jun 2025, 00:58
17 Jun 2025, 00:58
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66% (02:46) wrong based on 3 sessions
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Bob can read 30 pages and Jane can read 40 pages in an hour. Bob starts with a novel at 4:30 pm and Jane starts with the same novel at 5:20 pm , then after how many minutes after 5:20 pm, will they start reading the same page?
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150
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Re: Bob can read 30 pages and Jane can read 40 pages in an hour. Bob start
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17 Jun 2025, 01:28
17 Jun 2025, 01:28
2
good Q indeed, similar to relative speed distance,
let us first find out the rate of bob and jane in pages per minutes,
as work =Rate*time,
30 Pages=Rbob*60mins,
Rate of bob=1/2 pages/min
Rate of Jabe=2/3 pages/min,
now bob has started reading from 4:30 PM and Jane will start from 5:20 PM so Bob has already ahead with 50 mins of reading so in those 50 mins bob has already read W=R*T, W=1/2*50= 25 Pages,
so to cover those 25 pages and since bob is keep on reading let us find out the relative rate of both bob and jane which 2/3-1/2=1/6 {page/min},
so overall time in reading those 25 pages will be
W=R*T,
25=1/6*T so T=150 mins
let us first find out the rate of bob and jane in pages per minutes,
as work =Rate*time,
30 Pages=Rbob*60mins,
Rate of bob=1/2 pages/min
Rate of Jabe=2/3 pages/min,
now bob has started reading from 4:30 PM and Jane will start from 5:20 PM so Bob has already ahead with 50 mins of reading so in those 50 mins bob has already read W=R*T, W=1/2*50= 25 Pages,
so to cover those 25 pages and since bob is keep on reading let us find out the relative rate of both bob and jane which 2/3-1/2=1/6 {page/min},
so overall time in reading those 25 pages will be
W=R*T,
25=1/6*T so T=150 mins
gmatclubot
Re: Bob can read 30 pages and Jane can read 40 pages in an hour. Bob start [#permalink]
17 Jun 2025, 01:28
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