Question

15) A cylinder with radius 7cm and high 23cm is to be painted. Two types (Delux and Super Delux) of paints are available in the market 200ml of Delux covers 100cm? and costs Rs 400 per litre. 200 ml of super Delux covers 120 cm? and Rs 450 per litre.

a) What is the total surface area to be covered?
b) What will it cost to use Delux paint?
c)What will it cost to use Super Delux paint?

Answer 1

Answer:

a is the correct answer what is the total surface area to be covered

Answer 2

Step-by-step explanation:

a) Total surface area of cylinder = 2πr(h + r)

= 2 * 22/7 * 7 (23 +7)

= 44 * 30

= 1320 cm²