Latest Elitmus Aptitude Question SOLUTION: pt usha and shelly john decide to run a marathan between ramnagar and jamnagar. both start from ramnagar at 1 pm.on the way are two towns:ramgarh and rampur seprated by a distance

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(#M40010536) ELITMUS Numerical Ability question time and distance Keep an EYE

pt usha and shelly john decide to run a marathan between ramnagar and jamnagar. both start from ramnagar at 1 pm.on the way are two towns:ramgarh and rampur seprated by a distance of 15 km .pt usha reaches ramgarh in 90 minutes running at a constant speed of 40 km/hr.she takes additional 30 minutes to reach rampur.between rampur and jamnagar she maintains at average speed of v km/hr.shelly john being a professional marathan runner,maintains a constant speed of 18 km/hr.they both reach jamnagar togethar after n hours.what could be the total time taken by pt usha.

a:5 hours
b:15 hours
c:41 hours
d:all of the aboce.

Asked In Elitmus ankur trivedi (11 years ago)

Unsolved Read Solution (8)

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Read Solution (8) :

ankur trivedi  (11 years ago)

i think all of above.i am adding some facts along with above answer.
when we will put n=5,that is 75-2v/18-v=5 then v will be =5 km/hr.
and when we will put n=15 ,that is 75-2v/18-v=15.then v will be 15 km/hr.and then we will put 75-2v/18-v=41.then v will be 17km/hr.so 5 ,15,17 all the values of v are satisfying the equation .so answer will be all of the above.

Is this solution Helpfull? Yes (33) | No (3)  

jomon v j  (11 years ago)

answer 5 hours

ramnagar-------60km------ramgrah-------15km-----rampur----(n-2)vkm----jamnagar

total distance covered by shelly =18n
total distance covered by usha =60+15+(n-2)v=75+nv-2v

18n =75+nv-2v

18n-nv= 75-2v

n(18-v) =75-2v

n =75-2v/18-v

as n being a natural number the only satisfying above equation is when v =5

then n=65/13 =5

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Kapil Dev Mishra  (11 years ago)

JOMON V J

v | n
-------
5 | 5
13| 15
17| 17

all of the above

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jomon v j  (11 years ago)

thank you ankur for giving the correction to my answer.

Is this solution Helpfull? Yes (8) | No (4)  

SAURAV BANERJEE  (10 years ago)

but y n-2 ???? jomon sir

Is this solution Helpfull? Yes (6) | No   

Anuj Baranwal  (8 years ago)

BC ques to sahi post karo
Distance between ramgarh and rampur is 15 km. PT usha takes 30 min to reach rampur from ramgarh at speed of 40 km/hr how is it possible MFu**er

Is this solution Helpfull? Yes (1) | No (4)  

Aaqil Khan  (7 years ago)

Here (n-2) is done because Usha has spent 90 mins+ 30 mins in running=9+30=120 mins i.e. 2 hours.
So total time taken to travel from ramgarh to ramnagar=(n-2) hours.

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Amrut P Pakhale  (8 years ago)

will anyone describe why (n-2)?

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