Answer:
let the sides of the base be a, b, and C
lateral surface Area =432cm² and h=18cm
SA=0.5ah+0.5bh+0.5ch
432=0.5h(a+b+c) after factorization
432=0.5×18(a+b+c)
432=9(a+b+c)
432/8=a+b+c
48=a+b+c
ratio 3:4:5
total in ratio is 3+4+5=12
48=a+b+c
12=3+4+5
to make twelve equal to 48, multiply by 4
(12=3+4+5)4
48=12+16+20
the side lengths are 12cm,16cm and 20cm
HOPE ITS CLEAR,
PLEASE
MARK BRAINLIEST
