Brainliest plus points
hint- answer to a is 0.84 metre squared
answer to b is 0.072 metre cubed
i just need full working out ; )

Step-by-step explanation:

a)  Internal surface area:

height h = 300 mm = 3 cm =0.3 m

breadth  b = 1000 -(300+300) = 1000 - 600 = 400 mm = 0.4 m

length l = 1200 -  (300+300)   = 1200 - 600 = 600 mm = 0.6 m

Internal surface Area = lb + 2hl + 2bh

                                   = 0.6 * 0.4  + 2 * 0.3 * 0.6  + 2 * 0.4 * 0.3

                                    =  0.24 + 0.36 + 0.24

                                      = 0.84 sq.m

b) Volume

volume = lbh

             = 0.6 * 0.4 * 0.3

              = 0.072 cu. m

the length of o'p' is .

step-by-step explanation:

it is given that the quadrilateral m'n'o'p' is the image of quadrilateral mnop after dilation.

the center of dilation is origin and the scale factor is 1.5.

in dilation the image and preimge are similar figures. it means the sides of image and preimage are proportional.

the scale factor is defined as

the scale factor is 1.5.

multiply both sides by op.

note: if the value of op is given, then multiply the value of op with 1.5 to get the length of side o'p'.

therefore length of o'p' is .

x-3y=4

step-by-step e