P,Q and S are running a race on a circular track of circumference of 2100 m. When P completes one round, Q is 700m behind him. When S completes one round, Q is 300m ahead of him. What is the minimum distance from the starting point when they are together again?
A) 300m
B) 700m
C) 2100m
D) 16800m
E) None of these
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13 comments:
d
i think it E
I think it's E as well... they have to meet back at the beginning of the track, i.e. the minimum distance from start = 0. Q and P don't meet until P goes around the track 3 times and ends up back at the beginning. Q and S don't meet until S goes around the track 7 times and ends up back at the beginning. If all three ended up meeting again, they would have to be at the beginning.
Answer is D.
L.C.M of 21, 14, 24 - 168
Ans -D - 16800
Ithink its E
I think its E .......
I think its E .......
It can't be D because it's asking for minimum distance from starting point. Circumference is 2100, and 16800>2100. Maximum possible distance from starting point is 1050 (it's a circle track).
the ans is e.
it shoud be E... coz... it shoud be the LCM of 21,14 n 11.... nne of the option has this as an answer..
E
the answer is d)
the ratio of the speeds of p and q is 3:2 and the ratio of speeds of q and s is 8:7 .. we jus wanna combine these two ratios,,, it ll be 12: 8 : 7.. we have to take the lcm of these values.. tht is 168... therefore the answer is 16800
^ anonymous,that was nice description
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