IBPS SO Prelims Exam Model Paper 3

Given:
A cylinder of radius 14 cm and height 5 cm is melted and recast into cubes of edge length 2 cm.
Concept Used:
in this type of question, volume remains same after melting
Formula Used:
volume of cylinder =

22

7

× r2 × h; r = radius of cylinder, h = height of cylinder
volume of cube = a3; a = edge of cube
Calculation:
Let the number of identical cubes be 'n'.
⇒

22

7

× 142 × 5 = n × 23
⇒ 22 × 14 × 2 ×

5

8

= n
⇒ n = 385
∴ 385 identical cubes will be obtained.