Question

find the length and surface area of the wooden Plank of width 3M, thickness 75 cm and volume 33.75 M cube.

Answer 1

hiii!!!

here's Ur Answer...

height (width) the wooden plank = 3m

breadth (thickness) = 75cm = 0.75m

volume of the wooden plank = 33.75m³

therefore l × b × h = 33.75m³

==> l × 0.75 × 3 = 33.75m³

==> l × 2.25 = 33.75m³

==> l = 33.75/2.25

==> l = 15

hence, the length of the wooden plank is 15m

now, TSA (surface area) of the wooden plank = 2(lb+bh+lh)

= 2[(15×0.75)+(0.75×3)(15×3)]

= 2(11.25+2.25+45)

= 2(112.5)

= 225m²

hope this helps...!!