CUET General Test - 64 small solid iron spheres of radius 'r' are melted to form a big sphere of radius R. If S and S' are surface areas of the small and the big sphere respectively, then find the ratio S' : S. | PYQs + Solutions

CUET General Test 2023 28 May Shift 1

Geometry

Medium

4 : 1

8 : 1

16 : 1

24 : 1

✅ Correct Option: 3

Related questions:

26 May Shift 1

A sphere of maximum volume is 'cut out' from a solid hemisphere of radius r. The ratio of the volume of the hemisphere to that of the cut-out sphere is:

15 May Shift 1

Match List-I with List-II

List-I	List-II
(Figures, etc.)	(Area/Volume/Diagonal etc.)
(A) Surface area of Cube	(I) $\pi(R^2 - r^2)$
(B) Volume of Right pyramid	(II) $a\sqrt{2}$
(C) Area of Circular Ring	(III) $6a^2$
(D) Diagonal of Square	(IV) $\frac{1}{3}$ (area of base) × height

Choose the correct answer from the options given below:

22 May Shift 1

Find the values and arrange in increasing order:

(A) If each edge of a cube is increased by 20%, then the percentage increase in its volume is:

(B) If the radius of a cylinder is increased by 20%, while height increase 10%, then the percentage increase in the volume of the cylinder

(D) If the radius of a sphere is increased by 10%, then the percentage increase in its volume is:

Choose the correct order:

CUET General Test 2023 28 May Shift 1 PYQs

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