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An interesting fact about equivalent fractions

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The radius of earth is about 6400 km and that of Mars is 3200 km . The mass of the earth is about 10 times the mass of Mars . An object weighs 200 N on te surface of Earth . Its weight on the surface of mars will be .

A sum amounts to ₹ 7,562 in 4 years and to ₹ 8,469.44 in 5 years, at a certain rate percent per annum when the interest is compounded yearly. If ₹ 10,000 at the same rate of interest is borrowed for two years , then what will be the compound interest (in ₹ )? जब ब्याज का संयोजन वार्षिक है, तब एक राशि प्रति वर्ष एक निश्चित दर प्रतिशत से 4 वर्षों में 7,562 रुपये तथा 5 वर्षों में 8,469 रुपये हो जाती है। यदि इसी दर से 10000 रुपये दो वर्षों के लिए उधार लिए जाते हैं, तो चक्रवृद्धि ब्याज कितना होगा?

The simple interest on a sum of money at 10% per annum for 2 years is Rs. 8,100, Compounded annually. What would be the compound interest (in Rs.) on the same sum for the given period at the rate of interest ? एक धनराशि पर 10% प्रति वर्ष की दर से 2 वर्षों का साधारण ब्याज 8100 रुपये है। दी गयी अवधि के लिए ब्याज दर पर इसी राशि का चक्रवृद्धि ब्याज (रुपये में) कितना होगा?

In a X th standard examination out of the 100 students appeared 50 passed in all the subjects, 20 passed in science subjects only and 10 passed in languages only. All the remaining students failed in all subjects. Which of the following represents this fact?

A sum of Rs. 15,000 is invested partly at 12% per annum and the remaining at 10% per annum simple interest. If the total interest at the end of 2 years is Rs. 3,344 how much money was invested at 10% per annum? 15000 रुपये की एक राशि का कुछ भाग 12% प्रति वर्ष तथा शेष भाग 10% प्रति वर्ष साधारण ब्याज पर निवेश किया जाता है | यदि 2 वर्षों के अंत में कुल ब्याज 3344 रुपये है, तो 10% प्रति वर्ष की दर से कितनी राशि निवेश की गयी थी ?