Latest Tech Mahindra Aptitude Question SOLUTION: A jogger wants to save ?th of his jogging time. He should increase his speed by how much %age

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A jogger wants to save ?th of his jogging time. He should increase his speed by how much %age

Asked In Tech Mahindra siva (10 years ago)

Solved swati soni Read Solution (4)

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Read Solution (4) :

swati soni  (10 years ago)

question:A jogger wants to save 1/4th of his jogging time. He should increase his speed by how much %age.
Distance = Speed*Time
Here, we are assuming that the distance the jogger wants to run is the same
So,
Let Old speed = s and Old time = t. So, Distance = st
New time = 0.75t
So, new speed = st/0.75t = s/0.75 = 1.33s
So, he should increase his speed by 33%

Is this solution Helpfull? Yes (33) | No (14)  

Emanuel Abhishek Murmu  (9 years ago)

Considering the question: A jogger wants to save 1/4th of his jogging time. He should increase his speed by how much %age?

Answer:
let us assume that he runs the same distance(d), and his old speed and time be s1 and t1 resp.
s1= d/t1------(1)
now he has to decrease or save 1/4th of his old time t1.
so new time (t2)= 0.75t1
new speed (s2)= d/(.75t1)------------(2)
difference in speed(s)= d/(.75t1) - d/(t1) = (0.25*d)/(0.75t1)
therefore percentage increase in speed= (difference in speed*100)/new speed
= (0.25*d)/(0.75t1) * (0.75t1)/(d) * 100%
=25%

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Sravan kumar  (7 years ago)

please send it to me
potnurusk300@gmail.com

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Swarnendu Ganguly  (7 years ago)

please send it to me sganguly134@gmail.com

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