Govinda opened a R.D. account in a bank for 2 years 4 months. If the rate of interest is 8 % per year and the bank pays him ₹ 7,369.60 on maturity, find how much per month did Govinda deposit ?

If x + 5 is the mean proportion of x + 2 and x + 9, find the value of x.

A cylindrical vessel of diameter 14 cm and height 42 cm is fixed symmetrically inside a similar vessel of radius 8 cm and height 42 cm. The total space between the two vessels is filled with glass-wool for heat insulation. Find the volume of the glass-wool required.

In square ABCD, the vertex A = (2, 8) and vertex C = (8, 3). Find the equation of the diagonal BD.