Question

The internal measures of a cuboidal room are 10m × 6m ×4m. Find the total cost of whitewashing
all four walls and ceiling, if the cost of white washing is Rs 15 per .

Answer 1

Answer:

dimensions = 10m × 6m × 4m

lateral surface area =2 (l+b)×h

= 2(10+6)×4

= 2×16×4

=2×64

=128 square meter

cost rs. 5 square meter

total cost = 128×5= 640

rs.640

area of ceiling =10×6=60sqm

so, cost=rs.5×60

=rs. 300

total cost= 640+300= 940

Answer 2

Answer:

Rs. 3600

Step-by-step explanation:

L=10m B=6m H=4m

dimensions of cuboidal room = LxBxH

= 10x6x4

=240m³

cost of white washing per m³= Rs. 15

cost of white washing of 240m³= 15x240

=Rs. 3600

cost of white washing of 240m³ is Rs. 3600