Question

A factory manufactures 1,20,000 pencils daily. The pencils are cylindrical inshape., each of length 25cm and circumference 1.5cm. Determine the cost of colouring the curved surface of the penciles manufactured in one day at Rs0.05 per dm².

Answer 1

number of pencils manufactured in one day = 1,20,000
1 decimeter(dm) = 10 centimeter(cm)
length = 25cm = (25/10) dm = 2.5 dm
circumference = 1.5cm = (1.5/10) dm = 0.15 dm

curved surface area = circumference × length
                              = 2.5×0.15 dm²
                              =0.375 dm²
curved surface area of all pencils = 0.375×1,20,000 = 45,000 dm²
cost of colouring = Rs. 0.05 per dm²
total cost = 0.05×45,000 = Rs. 2250

Answer 2

Answer:

Step-by-step explanation:

number of pencils manufactured in one day = 1,20,000

1 decimeter(dm) = 10 centimeter(cm)

length = 25cm = (25/10) dm = 2.5 dm

circumference = 1.5cm = (1.5/10) dm = 0.15 dm

curved surface area = circumference × length

                              = 2.5×0.15 dm²

                              =0.375 dm²

curved surface area of all pencils = 0.375×1,20,000 = 45,000 dm²

cost of colouring = Rs. 0.05 per dm²

total cost = 0.05×45,000 = Rs. 2250