MathematicsFind the weight of solid rectangular iron piece of size 50 cm×40 cm   ×10 cm,   if 1  cm 3   of iron weights 8gm  .

Find the weight of solid rectangular iron piece of size 50 cm×40 cm   ×10 cm,   if 1  cm 3   of iron weights 8gm  .


  1. A
    160 kg
  2. B
    180 kg
  3. C
    120 kg
  4. D
    100 kg 

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    Solution:

    Given : An iron piece of dimensions 50cm×40cm×10cm  .
    Volume of the cuboid = l×b×h, where l is length, b is breadth and h is height.
    Now,
      Volumeoftheironpiece,V=50cm×40cm×10cm =20000c m 3  
    Given that, 1c m 3   of iron weights 8gm  .
    Thus, the weight of the iron piece is computed as follows:
      Weightofironpiece=20000×8gm =160000 gm   It is known that, 1kg=1000g  .
    Hence, weight in kilograms is obtained as follows:
      Weightofironpiece= 160000 1000 =160kg  
    Therefore, the weight of the iron piece is 160kg  .
    Hence, the correct option is 1.
     
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