Question

The length, breadth and height of a cuboid are 15 cm, 10 cm and 20 cm respectively. Find

its total surface area​

Answer 1

Answer:

1,300

Step-by-step explanation:

formula to find total surface area of a cuboid=

2(length x breadth+breadth x height+height x length)

length=15cm

breadth=10cm

height=20cm

=2(15x10+10x20+20x15)

=2(150+200+300)

=2x650

=1,300 cm cube

Answer 2

$\\ \large\mathfrak {\underline \purple{ \: \: \: \: \: \: \: \: concept \: \: \: \: \: \: \: \: }} \\ \\ \\ \sf \: Here \: , the \: query \: says \: to \: find \: the \: \\ \sf Total \: Surface \: Area \: of \: a \: cuboid \: \\ \sf whose, \: \red{ length} \: , \green{breadth }\: and \: \pink{height} \: is \: given. \\ \sf Here ,we \: will \: apply \: this \: formula \: - \\ \\ \large \bigstar{\underline {\boxed { \bf {\green\:{ Total \: Surface \: Area \: of \: a \: cuboid \: =2(l \times b + b \times h + h \times l) }}}}} \bigstar$

$\large\sf ➲{\underline{ \underline \color{darkgreen}{Given}}} \: \\ \\ \tt \red{ Length \: , l \longrightarrow \: 15 cm} \\ \\ \tt \green{ Breadth \: , b \longrightarrow \: 10 cm} \\ \\ \tt \pink{ Height \: , h \longrightarrow \: 20 cm} \\ \\ \\ \large\sf ➲{\underline{ \underline \color{darkgreen}{To \: find}}} \\ \\ \\ \\ \tt \color{navy}{Surface\: Area \: of \: the \: cuboid \longrightarrow \: ?}$

$\\ \large \bigstar{ \underline{ \underline \green{ \bf \: solution}}} \bigstar \\ \\ \\ \bf Surface \: Area \: of \: a \: cuboid \: = \: 2(lb+bh + hl) \\ \\ \bf = 2(15× 10 + 10× 20+20×15) \\ \\ \bf = 2( 150+200+300) \\ \\ \bf 2× 650 \\ \\ \bf { \underline{ \boxed{ \tt\red = \pink{ 1300 }\: cm {}^{2} }}}$

$\\ \bigstar{ \underline{ \underline \pink{ \sf★@iTzShInNy☆}}} \bigstar$