Question
अपनी सामान्य गति के \(\frac{3}{4}\)वें पर चलने से, एक आदमी सामान्य से 20 मिनट बाद तक पहुंचता है।वह आमतौर पर कितना समय लेता है?
(A) 30 मिनट (B) 60 मिनट (C) 70 मिनट (D) 50 मिनट
(A) 30 मिनट (B) 60 मिनट (C) 70 मिनट (D) 50 मिनट
Answer
Take initial variables as Distance 'd', velocity 'v' and time 't'. Modifying according to the current situation.
Equating distances (because distance is same for both the cases),
=> (.75v) \(×\) (t+20) = v \(×\) t
=> 3t + 60 = 4t
(0.75=3/4)
=> t = 60 min
B 60 minutes
Equating distances (because distance is same for both the cases),
=> (.75v) \(×\) (t+20) = v \(×\) t
=> 3t + 60 = 4t
(0.75=3/4)
=> t = 60 min
B 60 minutes
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