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In a 100 m race, A beats B by 10 m and B beats C by 10 m. By what distance does A beat C (in m)? |
19 18 20 21 |
19 |
According to the question, A = B + 10, B = C + 10, Therefore A : B : C 10 : 9 : 10 : 9 100 : 90 : 81 ⇒ The distance by which A beat C = 100 - 81 = 19m. |
