Question

There is a door of length 3 m and breadth Im is fitted in a wall The
length of the wall is 5.5 m and the breadth is 4.2 m. Find the cost of
white washing the wall of the rate of white washing the wall is ₹40​

Answer 1

$l \times b$

$5.5 \times 4.2 = 23.1$

$area \: of \: wall$

$but \: we \: have \: minus \: the \: area \: of \: door$

.

$3 \times 1 = 3$

$23.1 - 3 = 20.1$

$cost \: of \: white \: washing \:$

$= 20.1 \times 40 = 804rs \: only$