Question

In a building there are 24 circular pillar with each having a radius 28cm and height 4 cm find the cost of painting the curved surface area of all pillars @ Rs 8 per metre square

Answer 1

r=28cm or 0.28m
h=4cm or 0.04m
cost of painting per meter²
cost of painting 24 pillars=24×cost of painting one pillar
cost of painting 1 pillar=CSA of pillar ×8


csa=2πrh
=2×22/7×0.04×0.28m²
=44×0.04×0.4m²
=44×0.016m²
=0.704m²


cost of painting 1 pillar =0.704×8
cost=5.632/-


cost of painting 24 pillars =5.632×24
=135.168rs/-



hope it helps you enough, Happy New year

Answer 2

$\huge\bf{Answer:-}$

Yes

Explanation

Refer the attachment.