Question

tsa of a cuboid is 500 sq. units it's breadth is 6 units it's height is 5 units find its lenght

Answer 1

Total surface are = 500 units²

breadth = 6 unit
height = 5 unit
let length be 'l'

tsa = 2(lb + bh + lh)

500= 2( 6l + 30 + 5l )

$\frac{500}{2} = 6l + 5l + 30$

$250 = 11l + 30$
$250 - 30 = 11l$

$220 = 11l$
$l = \frac{220}{11}$

$l = 20$
therefore,

length is 20 units.