Question

The cylindrical vessel open at the top has a diameter of 21 cm and height 16 cm.Find the cost of tin plating it on inside at the rate of rs 10 per hundred sq cm

Answer 1

Answer:

Diameter=21cm

Radius= 21÷2=10.5

Height= 16cm(given)

Total surface area=Curved surface area + Area of base(bottom part only)

=2×pie×r×h+pie×square

=2×22/7×10.5×16 +22/7×10.5×10.5

=1401.5cm2

The cost of tin plating it on the inside

1401.5/100×10

140.15

Answer 2

Step-by-step explanation:

please see the attachment