community around the world.

Activity Discussion Math Maths

• # Maths

Posted by 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.

3 Members · 2 Replies
• 2 Replies
• ### Ameya

Member
June 5, 2023 at 8:58 pm
0

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

Member
June 5, 2023 at 9:55 pm
0

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

Start of Discussion
0 of 0 replies June 2018
Now
+