Question

find the volume of a cubical box if the cost of painting its outer surface is Rs 1440 at the rate of Rs 15 per m².

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Answer 1

Answer:

64

Step-by-step explanation:

answer and explanation given in picture

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Answer 2

ANSWER:-

64 m^3

EXPLANATION:-

Given:-  

cost of painting its outer surface = Rs 1440

Rate=Rs 15 per m^2

To Find:-

Volume of cubical box=?

Solution:-

total surface area= cost/cost/m^2

                                =1440/15/m^2

                                 =96m^2

total surface area of cube=6a^2

                          6a^2=96m^2

                            a^2=96m^2/6

                             a^2=16m^2

                             a=(4m)^2

                             a=4m

volume of cube= a^3

                         = (4m)^3

                           =4m*4m*4m

                           =64m^3

SO THE REQUIRED VOLUME AND THE VOLUME OF A CUBICAL BOX IS  64 m^3.