A person travels equal distances with speeds of 1 km/hr, 2 km/hr and 4 km/hr and takes a total time 3 hours and 30 minutes. What is the total distance the person covers?
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Dist: = . xkm
x/1+x/2+x/3 = 3.5
multiply by 6
6x+3x+2x=21
11x=21
x = 21/11=1 10/11 Km. Ans
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