Question

In a toys manufacturing company,wooden parts are assembled and painted to prepare a toy.One specific toy is in the shape of a cone mounted on a cylinder. The total height of the toy is 110 mm and the height of its conical part is 77 mm. The diameters of the base of conical part is 72mm and that of the cylindrical part is 40 mm.
(a) If its cylindrical part is to be painted red, the surface area that needs to be painted is
(i) 2320 2 (iii) 1120 2
(ii) 1320 2 (iv) 1720 2

(b) If its conical part is to be painted blue, the surface area that needs to be painted is
(i) 4328 2 (iii) 1124 2
(ii) 3956 2 (iv) 3528 2

(c) How much wood has been used in making the toy?
(i) 56824 3 (iii) 46464 3
(ii) 84424 3 (iv) 64684 3

(d) If the cost of painting the toy is 2 paise for 8 2,then what is the cost of painting a box of 100 toys? (i) ₹ 1598 (ii) ₹ 2558 (iii) ₹ 1419 (iv) ₹ 1894

(e) If the toy company charges 3paise for 32 3 of wood,what is the price of a box of 100 toys?
(i) ₹ 4356 (ii) ₹ 4698 (iii) ₹ 4178 (iv) ₹ 4898

Answer 1

1. 1720 mm²
2. 3528 mm²
3. 56824 mm³
4. ₹1894
5. ₹4698

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Answer 2

Step-by-step explanation:

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(a)If its cylindrical part is to be painted red, the surface area that needs to be painted is

(i) 2320 2 (iii) 1120 2

(ii) 1320 2 (iv) 1720 2

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(b) If its conical part is to be painted blue, the surface area that needs to be painted is

(i) 4328 2 (iii) 1124 2

(ii) 3956 2 (iv) 3528 2

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(c) How much wood has been used in making the toy?

(i) 56824 3 (iii) 46464 3

(ii) 84424 3 (iv) 64684 3

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(d) If the cost of painting the toy is 2 paise for 8 2,then what is the cost of painting a box of 100 toys? (i) ₹ 1598 (ii) ₹ 2558 (iii) ₹ 1419 (iv) ₹ 1894

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(e) If the toy company charges 3paise for 32 3 of wood,what is the price of a box of 100 toys?

(i) ₹ 4356 (ii) ₹ 4698 (iii) ₹ 4178 (iv) ₹ 4898

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• ₹4698

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