If the area of the base of a cylinder is 346.5 cm² and the area of the curved surface is 990 cm², then its height is:(take \( \pi = \frac{22}{7} \))
What is the value of x, if \((5 + 4^2) \div 3\ \text{of}\ x - 2 \times 4 = 7?\)
If the volume of a sphere is \(65\left(\tfrac{10}{21}\right)\,\text{cm}^3\), then its surface area is:(take \( \pi = \frac{22}{7} \))
\(77^{\tfrac{7}{4}}\ \text{cm}^2\)
\(76^{\tfrac{4}{7}}\ \text{cm}^2\)
\(78^{\tfrac{4}{7}}\ \text{cm}^2\)
\(78^{\tfrac{3}{7}}\ \text{cm}^2\)
A man covered a distance of 280 km in 8 hours on a motorcycle. How much distance will be covered on a bicycle in 2 hours, if he rides the bicycle at \(\frac{3}{14}\) of the speed of the motorcycle?