Question

• The dining hall of a hostel in a residential school measures 25m x 16 mx 4 m. It has
two doors each of size 3 mx 2 m, six windows each measuring 2m x 1.5 m and eight
vertillators each measuring 2 m x 0.5 m. What will be the cost of the white washing its
four walls and the ceiling at the rate of * 4.50 per mº. [Doors, windows and ventillators
are not to be white washed​

Answer 1

Step-by-step explanation:

volume of hall only =2(l+b)h+l×b-2(3×2)-6(2×1.5)-8(2×0.5)

=2(25+16)4+25×16-12-18-8

=328+400-38

=728-38

=690m^2

cost=690×4.50=₹3105