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22 Jun 2016, 03:10
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Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
55%
(hard)
Question Stats:
70% (02:57) correct
30%
(02:59)
wrong
based on 192
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A green lizard can travel from the green cave to the blue cave in 108 minutes; the blue lizard can travel from the blue cave to the green cave in 25% less time. If the green lizard started to travel 7.5 minutes before the blue lizard, how many minutes after the blue lizard, will the green lizard pass the middle line?
A. 2.
B. 3.5.
C. 4.
D. 5.5.
E. 6.
A. 2.
B. 3.5.
C. 4.
D. 5.5.
E. 6.
Updated on: 22 Jun 2016, 04:40
Originally posted by LightYagami on 22 Jun 2016, 03:51.
Last edited by LightYagami on 22 Jun 2016, 04:40, edited 1 time in total.
Last edited by LightYagami on 22 Jun 2016, 04:40, edited 1 time in total.
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Time take by the green lizard to cover the distance between the caves = 108 mins
Time take by the green lizard to cover half the distance = 108/2 = 54 mins
Time take by the blue lizard to cover the distance between the caves = 108 x 3/4 =81 mins
Time take by the blue lizard to cover half the distance = 81/2 = 40.5 mins
Now the green lizard had been travelling for 7.5 mins when the blue lizard started. Therefore when the blue lizard starts to move the green lizard will have to cover 54 - 7.5 = 46.5 mins worth of distance at its current speed.
Difference in time when they both reach the mid point = 46.5 - 40.5 = 6mins.
E IS THE CORRECT ANSWER.
Time take by the green lizard to cover half the distance = 108/2 = 54 mins
Time take by the blue lizard to cover the distance between the caves = 108 x 3/4 =81 mins
Time take by the blue lizard to cover half the distance = 81/2 = 40.5 mins
Now the green lizard had been travelling for 7.5 mins when the blue lizard started. Therefore when the blue lizard starts to move the green lizard will have to cover 54 - 7.5 = 46.5 mins worth of distance at its current speed.
Difference in time when they both reach the mid point = 46.5 - 40.5 = 6mins.
E IS THE CORRECT ANSWER.
22 Jun 2016, 04:29
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Bunuel
A green lizard can travel from the green cave to the blue cave in 108 minutes; the blue lizard can travel from the blue cave to the green cave in 25% less time. If the green lizard started to travel 7.5 minutes before the blue lizard, how many minutes after the blue lizard, will the green lizard pass the middle line?
A. 2.
B. 3.5.
C. 4.
D. 5.5.
E. 6.
time taken by green lizard to cover half dist=54 minA. 2.
B. 3.5.
C. 4.
D. 5.5.
E. 6.
time taken by blue lizard to cover full distance =0.75*108=81
time taken by blue lizard to cover half dist=40.5
As green lizard started early it will reach 54-7.5=46.5
So extra time taken by green lizard is 46.5-40.5=6mins
