Question

Find the surface area of this set of steps.answer is 26,940

Answer 1

Surface area in a ladder

There are 6 surface steps, 3 horizontal , 3 vertical

Area of 1 horizontal rectangle is : 25x 90 = 2250

then Area of 3 is 3x 2250= 6750

Area of 1 vertical rectangle is : 16 x 90 = 1440

Area of 3 verticals = 3x 1440 = 4320

NOW find area of

Floor,. 2 vertical walls,. 1 back wall

Floor area = 90 x (25+25+25) = 90x 75 = 6750

Vertical walls = 2 x 25x ( (16+16+16)+(16+16)+16) = 2x 25 x 96 = 4800

Back wall = 90x (16+16+16) = 4320

SO finally add all these 5 results

6750 + 4320 + 6750 + 4800 + 4320 =

Resulting in finally = 26,940