Mathematics
Medium
Question
A man covers a distance of 20 km in 3.5 hours partly by running and partly by walking. If he walks at 4 kmph and runs at 10 kmph, find the distance he covers by walking.
A
10 km
✓ Official correct answer
B
8 km
C
12 km
D
9 km
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A
10 km
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B
8 km
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C
12 km
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D
9 km
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