1.

A rectangular room is 4.5 m long,4 m wide and 3 m high. Find the cost of white washing [3]its walls and the roof at ₹ 7.50 per square metre.

Answer»

Step-by-step explanation:

Area of wall =lxbxh

= (4.5 X 4 x 3)m

=54M square

now,the COST of whitewashing the wall = 54m × ₹7.50 = ₹405



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