Question

3 The length, breadth and height of a room is 5 m,4 m and 3 m the cost of whitewash it's 4 walls at rate 7.r ruppes per meter square
a) 110 ruppes
b) 220ruppes
c) 109 rúppes
d) 105 ruppes

step by step expansion please
in note book​

Answer 1

Step-by-step explanation:

C.S.A of room = 2( bh + hl)

= 2( 4x3 + 3x5 )

2( 12 +15)

2( 27)

= 54

cost for white wash 54x7

= 378 rs