Q 1 - Ex 7.3 - Comparing Quantities - NCERT Maths Class 8th - Chapter 7, New Syllabus CBSE 2023

[AshokGangele-lj]

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[HV.EDITS.]

As u can see in the last of part 1 she
54000=P(21/20×21/20)
54000=P(441/400)
P=54000/441/400
P=54000×400/441
So, instant of doing this you can do it more easily by :
54000=P(21/20×21/20) (given)
P= 54000×20×20/21×21
Now you can cut the 1st 21 in denominator with 3 by 7 times and can cut the 54000 with 3 by 18000 times now cut the 18000 again with 3 to get 6000 and cut the 21 in denominator also with 3 by 7.
Now it will look like 6000×20×20/7×7
Now instant of multiplying all the neuminator and than devide it with 49 ( comes after multiplying both denominator), you can first devide the 6000 from 49 and than you will get answer 122.45 now multiply the 122.45 from 400(comes after multiplying the 20×20 in neuminator)
Than you will get the main answer 48980.

[AkGaming-zupg]

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[parulmishra]

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