Question

77. A factory manufactures 120,000 pencils daily The pencils are cylindrical in shape each
of length 25 cm and circumference of base as 1.5 cm. Determine the cost of colouring the
curved surfaces of the pencils manufactured in one day at 0.05 per dm?
[NCERT EXEMPLAR​

Answer 1

What's ur question???

Answer 2

Answer:

2250 Rupees

Step-by-step explanation:

Circumference of base = 1.5cm

2πr=1.5cm

Length of pencil= 25cm

Curved surface area of pencil= 2πrh

=1.5 × 25 = 37.5cm2

Total area to be painted = 120000 × 37.5

=4500000 cm2

=4500000÷100

=45000dm2

Rate of painting = 0.05/dm2

Cost of painting = 0.05 × 45000

=2,250 Rupees