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दो बसें 150 किमी. की यात्रा पर एक साथ चलती हैं। उनकी चाल क्रमशः 45 किमी./ घण्टा तथा 60 किमी./ घण्टा है। बताओ तेज बस कितने समय पहले पहुँच जायेगी?

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समय = दूरी / चाल

∴ पहली बस का समय t1 = \(\frac{150}{45}=\frac{10}{3}\)  घण्टा

∴ दूसरी बस का समय t2  =  \(\frac{150}{60}=\frac{5}{2}\)  घण्टा

∴ दूसरी बस द्वारा कम समय =  \(\frac{10}{3}-\frac{5}{2}\)

\(=\frac{5}{6}\times 60\) मिनट = 50 मिनट

अतः तेज बस 50 मिनट पहले पहुँचेगी।

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