Question

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Answer 1

Answer:

6275

Step-by-step explanation:

Length of bookshelf = 85 cm.

Breadth of bookshelf = 25 cm.

Height of bookshelf = 110 cm.

Thickness of plank = 5 cm.

∴ Area to be polished = [(110 * 85) + 2(85 * 25) + 2(110 * 25) + 2(5 * 110) + 4(75 * 5)]

= 9350 + 4250 + 5500 + 1100 + 1500

= 21700 cm².

∴ Cost of polishing at the rate of 20 paise per cm².

= (20/100) * 21700

= 4340.

∴ Area to be painted = 6(75 * 20) + 2(90 * 20) + (90 * 75)

                                   = 9000 + 3600 + 6750

                                   = 19350 cm².

Now,

Cost of painting at the rate of 10 paise per cm².

= (10/100) * 19350

= 1935.

∴ Total Expenses = Cost of polishing + Painting

                             = 4340 + 1935

                             = 6275.

Therefore, total expenses required for polishing = 6275.

Hope it helps!

Answer 2

Hi!!!!!


Refer to the attachment