Question

cost of painting a cubical box with lid at a rate of Rs. 5 per sq.cm is Rs. 1470.Find it's capacity​

Answer 1

Answer:

Given

Let the side of the cube be a and sq.cm be x

Cost of painting a cubical box per sq.cm =₹5

Cost of painting x sq.cm = 1470

Cost of painting x sq.cm = 1470/5 = 294 sq.cm

TSA of cube = 6a^2

6a^2=294

a^2=294/6

a^2=49

a=7cm

Capacity of cubical box = a^3

=(7)^3

=343 cubic units