Question

the diameter of the base of a right circular cylinder is 28 cm and its height is 21 cm . find its curved surface area​

Answer 1

Answer:

diameter of cylinder=28cm

radius=d÷2

=28÷2

=14cm

height=21cm

curved surface area =2×pie×r×h

=2×22÷7×14×21

2×22×2×21

=44×42

=1848cm2

Answer 2

Answer: 1848cmsquare.

step by step explanation:

Diameter of the base of the cylinder = 28 cm

=>Radius(r)=$\frac{Diameter}{2}$=$\frac{28}{2}$=14

Height of the cylinder=21 cm

=2πrh = 2 ×$\frac{22}{7}$ × 14 × 21 = 1848cmsquare.