Find this total surface area of this cuboid

132.5 m²

Step-by-step explanation:

surface area = 2( Lw ) + 2 ( HL ) + 2 ( HW )

S.A = 2 ( 7.5 × 2.3 ) + 2 ( 5 × 7.5 ) + 2 ( 5 × 2.3 )

S.A = 2 ( 17.25 ) + 2 ( 37.5 ) + 2 ( 11.5 )

S.A = 34.5 + 75 + 23

S.A = 132.5 m²

yx = 36

step-by-step explanation:

cos f = opposite side/ hypotenuse

cos f = yw / yx

we know cos f = 4/9 and yw =16

4/9 = 16/yx

multiply each side by yx

4/9 yx = 16/ yx * yx

4/9 yx = 16

multiply each side by 9/4

9/4 * 4/9 yx = 16 *9/4

yx = 36