Quantitative Aptitude
Out of his monthly income, Mr. Sharma spends 24% on house rent and 70% on household expenses and saves the balance. If every month, he saves ₹1,200, then what is his monthly income?
The sum of the radii of spheres A and B is 14 cm, the radius of A being larger than that of B. The difference between their surface areas is 112 π cm². What is the ratio of the volumes of B to A?
The ratio of the radius of the base and the perpendicular height of a right circular cone is given as 3 : 4 and the curved surface area of the cone is given as 2310 cm². Find the radius (in cm) of the base of the given cone.\(\text{(use } \pi = \frac{22}{7}\text{)}\)