Question

my maths problem plz help

Answer 1

Curved surface area = 2(l+b)h
= 2(5+4)3
$2 \times 9 \times 3 = 54$
Ceiling =
$l \times b$
=
$5 \times 4 = 20$
$54 + 20 = 74cm {}^{2}$
$74cm {}^{2} = 0.0074m {}^{2}$
$cost = 7.50 \times 0.0074 = 0.0555$
But I think the dimensions are in metre
so
$7.5 \times 74 = 555$
555 should be the answer because room dimensions are in metre

Answer 2

total area= 4*5(ceilling) + Walls  2*4*3+ 2*5*3  =74cm^2 = .0074m^2
cost = .0074*7.50 = .0555 rs