Question

can anybody help here!

Answer 1

@ganeshie8

Answer 2

Surface area of cuboid is just add up all faces

Answer 3

Surface area of cylinder = 2*pi*r*(r+h)

Answer 4

how do we do that?

Answer 5

Area of rectangle is width * height

Answer 6

Or width * length

Answer 7

a. 2((2x+1)+(2x)+(x+3)+(2x+1)+(x+3)+(2x))
2(4x^2+2x+2x^2+x+6x+3+2x^2+6x)
2(8x^2+15x+3)

Answer 8

is it right?

Answer 9

@kc_kennylau

Answer 10

Just the first step is wrong, second and third are alright

Answer 11

how can u please help me?

Answer 12

(2x+1)(2x) instead of (2x+1)+(2x)

Answer 13

just?

Answer 14

(x+3)(2x+1) instead of (x+3)+(2x+1)
(x+3)(2x) instead of (x+3)+(2x)

Answer 15

the solving part is right?

Answer 16

yes

Answer 17

b. 2(22/7)(w-1)(w-1+w+3)
44/7 (w-1)(2w+2)
44/7 (2w^2+2w-2w-2)
44/7(2w^2-2)
88/7(w^2-1)

Answer 18

@kc_kennylau

Answer 19

Did he ask you to substitute pi as 22/7

Answer 20

yes

Answer 21

Correct then

Answer 22

so its all ok right?

Answer 23

yes

Answer 24

thanks ALOT FOR YOUR HELP @kc_kennylau

Answer 25

no problem