alleryचाल में 6 km/h की कमी होने पर एक ट्रक को 72 km के मार्ग पर 1 घंटा अधिक समय लगता है। उसकी मूल चाल क्या थी?
A20 km/h
B24 km/h
C30 km/h
D36 km/h
Answer & Solution
Correct answer: B. 24 km/h
72/(s-6) - 72/s = 1 से s(s-6) = 432 प्राप्त होता है, अतः s = 24 km/h।
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