In a 500 m race, A can give B a start of 50 m and C a start of 140 m. How much start can B give C in a 1 km race?
Correct answer A. 200 m
Explanation
When A runs 500 m, B runs 450 m and C 360 m, so B : C = 5 : 4. In 1000 m, C runs 800 m, so B can give C 200 m.
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