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Which of the following statements about Prof. C. N. R. Rao is/are correct? 1.He is considered to be an international authority in solid-state and structural chemistry. 2. He is the first Indian to reach the H-index of 100, reflecting the economy of the body of his published research work. Select the correct answer using the code given below.

A solid metallic cuboid measuring 343 cm x 49 cm x 7 cm is melted and converted into cubes with side 7 cm. The sum of the total surface areas ( cm^2 ) of all the cubes is : 343 cm x 49 cm x 7 cm के किसी ठोस धात्विक घनाभ को पिघलाकर 7 cm भुजा वाले घन निर्मित किये जाते है | सभी निर्मित घणो के कुल पृष्ठ क्षेत्रफलों ( cm^2 में) का योग है:

The diameters of the internal and external surfaces of a hollow spherical shell are 6 cm and 10 cm respectively. If it is melted and made of solid cylinder of length 8/3 cm, then the diameter (in cm) of the cylinder is- एक खोखले गोलाकार खोल की आंतरिक एवं बाहरी सतहों का व्यास क्रमशः 6 सेमी ओर 10 सेमी है। यदि इसे गलाकर 8/3 सेमी लंबाई का ठोस बेलन बनाया जाता है, तो बेलन का व्यास (सेमी में) कितना होगा?