Latest Infosys Aptitude Question SOLUTION: at the same point at 7am. A starts moving towards east with speed 25km/hr and B towards south with speed 30km/hr..at what time they meet 130 meter apart??

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at the same point at 7am. A starts moving towards east with speed 25km/hr and B towards south with speed 30km/hr..at what time they meet 130 meter apart??

Asked In Infosys PujaDas (10 years ago)

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neeraj kumar  (10 years ago)

very easy method u can apply in this type of question easly but don,t ask the explanatio.if all the given no in km then there is no need to convert otherwise convert it
case 1 if the no like 25km/hr,30km/hr,130km
(25x)^2+(30x)^2=(130)^2
1525 x^2=16900
x^2=11.081967
x=3.329hr
cae 2 if the no like 25km/hr,30km/hr,130m then covert km/hr into m/s by multiplyiny the no by 5/18 i.e 25*5/18.solve like the case 1 method
after finding the value of x add with the given time we get ur answer.

Is this solution Helpfull? Yes (7) | No (4)  

MOUNICA DANDURI  (10 years ago)

we cannot find angles in exam is there any alternative solution

Is this solution Helpfull? Yes (4) | No   

neeraj kumar  (10 years ago)

A moves 25 km in 1 hr and B moves 30 km in 1 hr
then draw a right angled traingle by taking 25 and 30 as a side in the east and the south direction respectively like

|
|
______________25_____e
|
30 |
s
find the two angle
tan s=25/30
s=39.8 deg
and angle e=50.2
then make another right angled traingle with one side given that is hypo=130
and find the another two side by using
cos 39.8=side in the s direction(s1) /130
s1=99.87
sin 39.8=s2/130
s2=83.2
it means after travelling A 83.2 km and B 99.87 km they make a apart of 130 km
A travells 25km in 1 hr means 60 min
then 83.2 km in83.2/25=3 hr 33 min
so they wlii make apart of 130 in 7hr 3 hr 33min=10hr 33 min am

Is this solution Helpfull? Yes (2) | No (3)  

Sougata  (10 years ago)

it is 130meter, not 130km.. so the answer will be 7:00;11am

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Jaspalsingh Parmar  (10 years ago)

@ neeraj its given that 130 meter apart not 130 km

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MOUNICA DANDURI  (10 years ago)

@neeraj
Ashish and Rahul started walking from same point E. Ashish walked at the speed of 15 kmph to the east, and Rahul walked 25 kmph to south, at what time they meet 10 miles apart?

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neeraj kumar  (10 years ago)

answer is 10.33am

Is this solution Helpfull? Yes | No (1)  

PujaDas  (10 years ago)

plzz explain clearly..@neeraj

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neeraj kumar  (10 years ago)

@parmar change it yaar
1km=1000m
1km/hr=5/18 m/s
1m/s=18/5 km/hr
and if want the solution then read my solution one again.

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