Question

The dimensions of a room are 6m× 5m×2m calculate the cost of white washing the walls and the ceiling at the rate of rupees 6.50 per metre square​

Answer 1

Answer:

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Step-by-step explanation:

first of all, the formula of cuboid =2(l*b+b*h +h*l)

then,2(6*5+ 5*2+2*6)

=2(30+10+12)

=2(52)

=52*2

=104m2

then to find rate=6.50*104

=676 rupesss

Answer 2

Answer:

Step-by-step explanation:

l=6m

b=5m

h=2m

TSA of a room without floor = 2h(l+b)+lb

               =2×2(6+5)+6×5

               =4×11+30

               =44 + 30

               = 74m²

₹6.50 per m²

              = 6.50 × 74

              = ₹481