In a 400 m race the ratio of speeds of two runners a and b is 3:4 a has a start of 130 m a wins by

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In a $200 \mathrm{~m}$ race, Eswar gives Girish a start of $10 \mathrm{~m}$ and beats him by $10 \mathrm{~m}$. Find the ratio of their speeds (A) $1: 1$ (B) $9: 10$ (C) $10: 9$ (D) $19: 20$