Question

a cylindrical vessel contains 49.896 litres of liquid cost of painting its CSA at 2 Paisa per CM square is rupees 95.04 then TSA is equals to

Answer 1

GIVEN:

Volume of cylindrical vessel= 49.896 L

= 49.896× 1000 = 49896 cm³

[ 1 L = 1000 cm³]

Cost of painting at 2 paise per square cm= ₹ 95.04

Curved surface area of cylinder= cost / rate

Curved surface area of cylinder=95.04/.02

Curved surface area of cylinder= 4752 cm²

Let r and h be the radius and height of the cylinder .

Curved surface area of cylinder= 2πrh

2πrh = 4752……..(1)

Volume of Cylinder= πr²h

πr²h= 49896 ……….(2)

From equation 1 and 2

2πrh/πr²h = 4752/49896

2/r = 594/6237

r= 21 cm

Put this value of r in eq 1

2πrh = 4752

2 × (22/7)× 21× h= 4752

2×22×3×h = 4752

h= 4752/2×22×3

h= 36 cm

Total surface area of the cylindrical vessel= 2πr(h+r)

= 2×(22/7)×21(21+36)

= 2×22×3(57)

= 7524 cm²

Hence, the total surface area of the cylindrical vessel is 7524 cm²

Hope this will help you....

Answer 2

Answer:

7524

Step-by-step explanation:

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