Question

The dimensions of a wooden box is 25cm × 25cm×40 cm . It is required to cover with a cloth . If 1 square metre of cloth costs Rs 30 . Find the cost of the cloth for 20 such boxes.

The ans is given Rs 315. explain it step by step ​

Answer 1

Answer:

315 rupees

Step-by-step explanation:

It's total surface area is 2(lb+bh+lh) = 2(625+1000+1000) = 2*2625 = 5250 cm²

Hence, total surface area of such 20 boxes is = 20*5250 = 105000 cm² = 10.5 m²

Given, cost of 1m² = ₹30

Hence,

required cost is 10.5*30 = ₹315.

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