Question

pls answer this to the attachment​

Answer 1

Answer:

y=3/2

Step-by-step explanation:

the surface area of the rectangular prism,

2(y×2y+2y×6y+6y×y) = 90

or, 2y²+12y²+6y²=90/2

or, 20y²=45

or, y²=45/20

or, y²=9/4

or, y=√(9/4)

or, y=3/2 (here y≠3/2 since the value of length can't be negative)