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The speed of Ram is 12 km/hr but he stops at every fifth kilometer for 9 min. Then find the total time taken by Ram to cover 84 km?1. 9 hr 24 minutes2. 8 hr 24 minutes3. 9 hr 12 minutes4. 8 hr 12 minutes |
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Answer» Correct Answer - Option 1 : 9 hr 24 minutes Given: The speed of Ram is 12 km/hr. Ram stops at every fifth kilometer for 9 min and total distance is 84 km. Formula/Concept used: Speed = Distance/time Calculation: Time taken by Ram to cover 84 km at the speed of 12 km/hr = 84/12 hr ∴ Time = 84/12 = 7 hr Now, he stops at every fifth kilometer for 9 min ∴ Number of times he stop = 84/5 = 16.8 times and for the last kilometers he covers the full distance without any stoppage. Total stoppage = 16 times (since for the last kilometers he covers the full distance without any stoppage.) Time taken in stops = 9 × 16 = 144 minutes = 2 hr 24 minutes ∴ Total times = 7 hr + 2 hr 24 minutes = 9 hr 24 minutes ∴ Total time taken by Ram to cover whole distance is 9 hr 24 minutes |
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