Question

Inner dimensions of a wooden open box are 65cm,45cm,
30 cm and it is made of 2.5 cm thick wood . Find the capacity of the box .Find the weight of box in kg if 65cm cube wood weighs 9grams .

Answer 1

Given : Length = 65 cm, Breadth = 45 cm, Height = 30 cm
Now the capacity of the box will be equal to the inner volume of the box
Hence, the inner volume(capacity) = (65 * 45 * 30) cm3 = 87750 cm3
                     Now it has been also given that the thickness of wood is 2.5 cm
Hence the outer length will be 65+(2.5 + 2.5) = 70            ........(since the thickness is from both sides                                                                                                      of inner length)
Similarly the outer breadth will be 45+(2.5 +2.5) = 50 cm
                & the outer height will be 30+(2.5 +2.5) = 35 cm
Hence the outer volume of the box will be = (70 * 50 *35) cm3 = 122500 cm3
                   Hence the volume of block used = (122500 - 87750)cm3 =  34750 cm3
Now 60cm3  of wood weighs = 9 gms
         1cm3    of wood weighs = 9/60
         114700cm3 of wood weighs =(9*34750) /60 = 5212.5 gms or 5.2125 kgs
          
So the inner capacity of box is 87750 cm3 and the weight of box is 5.2125 kgs

Answer 2

Farhan ne 65cm^3ke jagah 60cm^3 liya hai .correction Kar
Lena.