घड़ी की घंटे वाली सुई (5) घंटे (36) मिनट में कितने रेडियन घूमती है?
Through how many radians does the hour hand of a clock rotate in (5) hours (36) minutes?
Explanation opens after your attempt
D. \(\frac{14\pi}{15}\)
Concept
(5) hours (36) minutes \(=\frac{28}{5}\) hours and the hour hand rate is \(\frac{\pi}{6}\) radians per hour. Hence the angle is \(\frac{28}{5}\times\frac{\pi}{6}=\frac{14\pi}{15}\).
Why this answer is correct
The correct answer is D. \(\frac{14\pi}{15}\). (5) hours (36) minutes \(=\frac{28}{5}\) hours and the hour hand rate is \(\frac{\pi}{6}\) radians per hour. Hence the angle is \(\frac{28}{5}\times\frac{\pi}{6}=\frac{14\pi}{15}\).
Exam Tip
(5) घंटे (36) मिनट \(=\frac{28}{5}\) घंटे और घंटे सुई की दर \(\frac{\pi}{6}\) रेडियन प्रति घंटा है। इसलिए कोण \(\frac{28}{5}\times\frac{\pi}{6}=\frac{14\pi}{15}\) है।
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