Latest HCL Aptitude Question SOLUTION: 1/3 of a certain journey is covered at the rate of 25km/hr,1/4 at the rate of 30 km/hr and the rest is 50 km/hr.the avg speed for the whole journey is : option: 30,30,33 1/3,37 1/1

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(#M40151253) HCL Numerical Ability question distance Keep an EYE

1/3 of a certain journey is covered at the rate of 25km/hr,1/4 at the rate
of 30 km/hr and the rest is 50 km/hr.the avg speed for the whole journey is :
option: 30,30,33 1/3,37 1/12 km/hr

Asked In HCL Nikita (9 years ago)

Unsolved Read Solution (3)

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Read Solution (3) :

Mounika  (8 years ago)

Let total distance be x.
T=x/3*25+x/4*30+5x/12*50=x/75+x/120+x/120.
Therefore avg.speed=x/9x/300=100/3

Is this solution Helpfull? Yes (9) | No (4)  

kranthi kanchanapally  (9 years ago)

let assume total distance will be 120km then
distance traveled at teh speed 25km/hr=1/3*120=40km the time=40/25=1.6hrs
distance traveled at the speed 30km/hr=1/4*120=30kmthe time is=30/30=1 hr
then remaining distance is 120-40-30=50km
the time taken to travel 50km=50/50=1hr
so total time is=1.6+1+1=3.6 hrs
so avg speed =120/3.6=33.33km/hr

Is this solution Helpfull? Yes (4) | No (2)  

abhinav verma  (8 years ago)

ans-> 33.33kmph

avg speed= total dist / total time

total distance= d(say)

total time= d/(3*25) + d/(4*30) + 5d/(12*50)

putting the values in above formula
we get avg speed as 33.33kmph

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