Saurabh takes 15 minutes to reach school from his house and Sachin takes one hour to reach school from his house. Find the ratio of the time taken by saurabh to the time taken by sachin
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Answer:
What is the only one of our lives for a labelled
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Step-by-step explanation:
Thick envelop of air around the earth is called atmosphere. ... Air is a mixture of many gases like oxygen, nitrogen, carbon dioxide, argon etc. We inhale oxygen from air. Atmosphere contains 21% oxygen, 78% nitrogen and 1% other gases. Atmosphere extends up to the height of about 120 km above the earth surface.
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