Question

the dimensions of a rectangular box are in the ratio 5 : 3 : 2 its total surface area is 15.5 square metres . the dimensions of the box are

Answer 1

Answer:

1.25m,0.75m,0.5m

Step-by-step explanation:

surface area of a rectangular box=2(lb+bh+hl)

15.5=2(5x×3x+3x×2x+2x×5x)

15.5=2(15x+6x+10x)

15.5=2(31x)

15.5=62x

x=15.5/62

x=155/620

x=31/124

x=1/4

5x=5/4=1.25

3x=3/4=0.75

2x=2/4=0.5

therefore the dimensions are 1.25m,0.75m,0.5m