An oil drum is in the shape of cylinder, whose diameter is 2 m. and height
is 7 m. The painter charges 5 per m2 to paint the drum. Find the total
charges to be paid to the painter for 10 drums.
Answers
Answer: Rs. 2514
Step-by-step explanation:
Given,
Diameter of drum = 2 m
Radius of drum = 1 m
Height of drum = 7 m
T.S.A. of drum =
== 2 x 22/7 x 1(1+7)
= 2 x 22/7 x 8
= 352/7 m²
= 50.28 m²
Painting charge per sq meter = Rs.5
Cost of painting 10 drums = T.S.A of 1 drum × Painting charge per sq m × 10
= 50.28×5×10
= 2514
The total cost for painting 10 drums is Rs. 2514.
Given,
Diameter of an oil drum(cylinder) = 2m
Height of the oil drum = 7m
The painter charges 5 per meter to paint the drum.
To find out,
Find the total charges to be paid to the painter for 10 drums.
Solution:
Radius of the oil drum is 1 meter.
Total surface area of a cylindrical drum = 2×π×r(r + h) = 2×22/7×1(1 + 7) = 2 ×22/7 × 8
= 352/7 = 50.28 m^2
Therefore the total surface area of cylinder is 50.28 meter square.
Painting charge per 1 m² is rupees 5.
Charge per 50.28m² is = ?
Cost of painting of 10 drums = 50.28 x 5 × 10
= 2514 rupees.
Therefore the total charges to be paid to the painter for 10 drums is 2514 rupees.