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Walking 3/4 of his usual speed, A person is 10 minutes late. Find his usual time to cover a distance?1. 30 minutes.2. 20 minutes.3. 40 minutes.4. 60 minutes. |
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Answer» Correct Answer - Option 1 : 30 minutes. Given: Time = 10 minutes. Formula used: Distance = Speed × Time Calculation: Let the usual time be x min. Then, Speed = 1 km/hr. According to the question: (1 × x) = (3/4) × (x + 10) ⇒ 4x = 3x + 30 ⇒ 4x – 3x = 30 ⇒ x = 30 ∴ The time is 30 minutes. |
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