Sharman decides to travel 100 kilometres in 8 hours partly by foot and partly on a bicycle, his speed on foot being 10 km/h and that on a bicycle being 20 km/h, what distance would he travel on foot?

Sharman decides to travel 100 kilometres in 8 hours partly by foot and partly on a bicycle, his speed on foot being 10 km/h and that on a bicycle being 20 km/h, what distance would he travel on foot?

• A. 20 km
• B. 30 km
• C. 50 km
• D. 60 km

 

The correct answer is option D. 60 km. Can you explain this answer in the comments?

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