Nakul was doing an experiment to find the radius r of a ball. For this he took a cylindrical container with radius R = 7 cm and height 10 cm. He filled the container almost half by water as shown in the figure-1. Now he dropped the ball into the container as in figure-2. He observed that in figure-2, the water level in the container raised from P to Q i.e, to 3.4 cm.

(i) What is the approximate radius of the ball? (a) 3 cm (b) 5 cm (c) 7 cm (d) 9 cm

(ii) What is the volume of the cylinder? (a) 1260 cm^{2} (b) 540 cm^{3} (c) 1620 cm^{3} (d) 1540 cm^{3}

(iii) What is the volume of the spherical ball? (a) 620 cm^{3} (b) 824.26 cm^{3} (c) 523.81 cm^{3} (d) 430.1 cm^{3}

(iv) How many litres of water can be filled in the full container ? (a) 1.54 litres (b) 2 litres (c) 5 litres (d) 7.5 litres

(v) What is the total surface area of the spherical ball? (a) 441.34 cm^{2 } (b) 314.29 cm^{2} (c) 620 cm^{2} (d) 816 cm^{2}