64 solid iron spheres of radius r are melted to form a sphere of radius R. Find R : r. Option 1: 2 : 1 Option 2: 3 : 1 Option 3: 8 : 1 Option 4: 4 : 1

The answer is '4 : 1'. View full solution:

CUET General Test - 64 solid iron spheres of radius r are melted to form a sphere of radius R. Find R : r. | PYQs + Solutions

CUET General Test 2023 24 May Shift 3

Geometry

Medium

2 : 1

3 : 1

8 : 1

4 : 1

✅ Correct Option: 4

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24 May Shift 3

A cuboidal slab of copper having dimensions 22 cm $\times$ 10 cm $\times$ 5 cm is melted and recasted in the form of a wire of 1 mm diameter. The wire is rubber coated at the rate of Rs. 1.50 per meter. Find the cost of rubber coating (in Rs.) Use $\pi = \frac{22}{7}$ .

20 May Shift 1

The base radius of a cone is 21 cm and the height is 28cm, then which of the following is/are correct?

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(D) Curved Surface Area = 2310 cm²

Choose the correct answer from the options given below:

19 May Shift 1

A cylindrical jar having a base of radius 15 cm, is filled with water up to a height of 20 cm. If a solid iron spherical ball of radius 10 cm is dropped in the jar to submerge completely in the water, then the increase in the level of water is:

CUET General Test 2023 24 May Shift 3 PYQs

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