Latest Infosys Aptitude Question SOLUTION: If i walk with 30 miles/hr i reach 1 hour before and if i walk with 20 miles/hr i reach 1 hour late.Find the distance between 2 points and the exact time of reaching destination is

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If i walk with 30 miles/hr i reach 1 hour before and if i walk with 20 miles/hr i reach 1 hour late.Find the distance between 2 points and the exact time of reaching destination is 11 am then find the speed with which it walks.

Asked In Infosys (14 years ago)

Solved hitesh gakhar Read Solution (3)

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Read Solution (3) :

hitesh gakhar  (14 years ago)

LET ORIGINAL SPEED BE V AND TIME TAKEN BE T...

AS DISTANCE BETWEEN TWO POINTS IS CONSTANT,
30*(T-1)=20*(T+1)=V*T

HENCE, V=24MILE/HR
T=5 HRS

DISTANCE BETWEEN TWO POINTS IS 120 MILES

Is this solution Helpfull? Yes (40) | No (14)  

Sreeja  (10 years ago)

Let us suppose actual time taken be ‘t’ hrs
If speed= 30 miles/hr, t= (t-1)hr ==> d= 30(t-1) miles
If speed = 20 miles/hr, t2=(t-1)hr ==> d= 20(t+1) miles
Since dist is equal thru out the journey, equate both distances.
i.e., 30(t-1)=20(t+1)  t= 5hrs…….. from this d=20(5+1)=120 miles
And, speed= d/t = 120/5 = 24 miles

Is this solution Helpfull? Yes (21) | No (2)  

Sreeja  (10 years ago)

Let us suppose actual time taken be ‘t’ hrs
If speed= 30 miles/hr, t= (t-1)hr ==> d= 30(t-1) miles
If speed = 20 miles/hr, t2=(t+1)hr ==> d= 20(t+1) miles
Since dist is equal thru out the journey, equate both distances.
i.e., 30(t-1)=20(t+1)  t= 5hrs…….. from this d=20(5+1)=120 miles
And, speed= d/t = 120/5 = 24 miles/hr

Is this solution Helpfull? Yes (8) | No (2)  

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