Question

• How many cubic centimetres of iron are there in an open box whose external dimensions are 36 cm, 25 cm and 16.5 cm, the iron being 1.5 cm thick throughout?
If 1 cm³ of iron weighs 15 g, find the weight of the empty box in kilograms...

Please answer my questions...

Right answer will be marked as brainlist...✨✨​

Answer 1

Step-by-step explanation:

External volune =L×B×H=36×25×16.5=14850 cm

3

Thickness of iron =1.5 cm

Internal l=36−2(1.5)=33 cm

b=25−2(1.5)=22 cm

h=16.5−2(1.5)=13.5 cm

Internal =l×b×h

Volume =33×22×13.5

Volume of iron used =(external -internal) volume

=(14850−9801)cm

3

5049 cm

3

Weight of 1 cm

3

of iron =7.5 gm

Then, weight of the box =5049×7.5

37867.5 gm

37.86 kg.