Question

The internal measures of a cuboidal room are 14m×10m×6m find the cost of white washing the cieling and the wals if the rate of whatewashing is 15rs

Answer 1

cuboidal wall = 4 walls + 1 ceiling

cuboidal wall=LSA +area of 1 rec

=2h(l+b)+l*b

=2*6(14+10)+ 14*10

=12(24)+140

=288+140

=428

now cost of white washing @ rate of RS 15

=428*15

=RS 6420