Answer / arun

A=20m/hr
B=40m/hr
c=50m/hr


A takes 10 hr to completly cover the circle i.e 200/20
Likewise B takes 5hr
c takes 4hr
take l.c.m for 10,5,4 i.e 20
Ans is 20

Answer / vinod

200m is nt the length of the circle......n wht is lenght of a circle uh? it s d radius......so the total perimeter of the circle is 2*pi*R IE 2*3.14*200==1256m....thy wii all meet after 6280 mts which s divisible by all the three numbers n the person travelling with 20m/h wii take the max time to cover tht dist.....ie 6280/20====314 hrs.......

Answer / kaka

4 hrs.

Answer / rajasekaran

A=20m/hr
B=40m/hr
C=50m/hr

length of circle that is 200.

the circle is 200m
if A take 10hr it reach the circle,
10*20=200 mod 200=0 (here mod is modulus)

if B take 10hr it reach the circle,
10*40=400 mod 200=0

if C take 10hr it reach the circle,
10*50=500 mod 200=100.

so from the above, take 20hr for A,B,C

A=>20*20=400 mod 200=0
B=>20*40=800 mod 200=0
C=>20*50=1000mod 200=0

so all are meet after 20hr.

Answer / maharajan

4hrs

Answer / sanjay

Not resolved yet

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