Study the given pattern carefully and select the number from among the given options that can replace the question mark (?).
Mohan borrowed an amount of ₹18,000 and paid a simple interest of ₹2,700 at 10% per annum. Find the duration for which he kept the borrowed amount.
\( \frac{3}{2} \) years
\( \frac{2}{3} \) years
\( \frac{3}{20} \) years
3 years
Simplify: \(\sqrt{51+\sqrt{134+5\sqrt{42+\sqrt{16+\sqrt{9}}}}}\)
A hollow metallic sphere has internal and external radius of 3 cm and 5 cm respectively. It is melted and recast as a solid cylinder with radius 7 cm. What is the height of the cylinder?