Question

explain why 2(lw+wh+lh) formula use?​

Answer 1

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Let us assume length, breath and height of the cuboid as l,w and h respectively.

A cuboid has 6 faces made up of 6 rectangles.

Two rectangles have dimensions l, w two have w,h and other two have h, l.

So the total area of a cuboid will be the total area of these 6 rectangles.

Hence the formula for area of a cuboid is :

= ( l×w) ( l×w) + (w×h) (w×h) + (h×l) (h×l)

= 2 ( lw+wh+hl)

Answer 2

Answer:

They differentiate into three main types: dermal, vascular, and ground tissue. ... Dermal tissue, for example, is a simple tissue that covers the outer surface of the plant and controls gas exchange. Vascular tissue is an example of a complex tissue, and is made of two specialized conducting tissues: xylem and phloem.