allery30 km/h की चाल से चलने पर एक छात्र 5 मिनट देरी से स्कूल पहुँचता है और 40 km/h की चाल से चलने पर 5 मिनट पहले पहुँचता है। स्कूल कितनी दूर है?
A20 km
B25 km
C24 km
D18 km
Answer & Solution
Correct answer: A. 20 km
d/30 - d/40 = 10 मिनट = 1/6 घंटा, जिससे d/120 = 1/6 प्राप्त होता है, अतः d = 20 km।
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