Question

A rectangular room is 10 metre long 6 metre wide and 5 metre high. It has two doors 1.5 metre by 2 metre each and two Windows 2 metre by 1.8 metre each. Find the cost of white washing the walls and ceiling of the room at the rate rupees 50 per metre square

Answer 1

Area of room=2×h (l+b)
=2×3.5×6×5 =210sq.m
area of one door=1.1×2 = 2.2sq.m
area of two door=2.2×2 = 4.4sq.m
area of one window =1.5×1.4 = 2.1sq.m
area of three window =2.1×3 = 6.3sq.m
area of walls = 210-2.1-6.3
=201.6sq.m
cost of whitewashing the walls =201.6×50
=Rs.10080

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Answer 2

Answer:7340rupees

Step-by-step explanation:

TSA of the walls are 2(L+B)h

= 2(16)5

= 160

now lets minus the window and door area

160 - 7.2 - 6

= 146.8

now lets multiply by 50 to get the final answer

148.6 *50 =( 7340)