Question

The internal measures of a cuboidal room are 10mx 6mx3m.Find the total cost of white washing all the four walls and the ceiling of the room,if the cost of white washing is rs 20 per m²
a)3130
b)3120
c)312
d)none of these

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Answer 1

Step-by-step explanation:

Length=10m

Brsadth=6m

Height=3m

Area of four walls=2(l+b)h+lb

=2(10+6)3+10×6

=w×16+60

=32+60

=82m²

Cost of white washing=82×20

=₹1640