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  Maths

  Posted by Anagha Babu on June 5, 2023 at 3:45 pm

  In a model of factory, the chimney is 9 cm high while the chimney of the actual factory is 12 m high. If height of the actual factory is 28 m, find the height of the model of factory.

  Sarandeep Singh replied 1 year, 9 months ago 3 Members · 2 Replies
• 2 Replies

• 

  Ameya Langer

  Member

  June 5, 2023 at 8:58 pm

  Actual height of chimney=12m=12*100 cm=1200cm

  height of model of chimney=9cm

  Using unitary method

  If actual height of chimney is 1cm then height of model of chimney=9/1200 cm =0.0075cm

  So height of model of a object of 1cm height=0.0075cm

  Now we have been given that height of factory is 28m=2800cm

  the height of model of factory= height of factory x height of model of height 1cm

  =2800*0.0075cm=21cm=0.21m

  height of model of factory=0.21m

• 

  Sarandeep Singh

  Member

  June 5, 2023 at 9:55 pm

  First we will convert all the units in terms on centimetre

  actual height of chimney = 12m = 12*100= 1200 cm

  actual height of the factory= 28m = 28*100= 2800cm

  ratio of height of model chimney to height of actual chimney = 9/1200

  = 3/400

  height of model factory= ratio of height of model chimney to height of actual chimney* height of actual factory

  =3/400*2800

  =21cm or 0.21m

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