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The volume of a cube is 2744 cm 3 2744 \text{ cm}^3 2744 cm 3 . A circle whose diameter is the same as the side of the cube is drawn on each face of t...

Banking RBI Grade B Prelims Medium Number System (including HCF LCM) MCQ

Question

The volume of a cube is 2744 cm32744 \text{ cm}^3. A circle whose diameter is the same as the side of the cube is drawn on each face of the cube. The circular part is painted red and the remaining part of each face is painted blue. The cost of painting the red part is Rs. xx per m2\text{m}^2 and the cost of painting the blue part is Rs. (x−5)(x - 5) per m2\text{m}^2. If the total cost of painting all six faces is Rs. $6972$, find the value of xx.

Options

A.

11

B.

10

C.

9

D.

6

E.

7

cubevolumesurface areacirclepainting costareacost calculation

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