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bhishamdeep

· started a discussion

· 1 Months ago

bhishamdeep (Question: 115377.0 )

instead of 25 it should be 75

Question:
Out of the total production of iron from hematite, an ore of iron, 20% of the ore gets wasted, and out of the remaining iron, only 25% is pure iron. If the pure iron obtained in a year from a mine of hematite was 80,000 kg, then the quantity of hematite mined from that mine in the year is :
Options:
A) 5,00,000 kg
B) 4,00,000  kg 
C) 4,50,000 kg
D) None of these
Solution:
Ans: (b) \(\cfrac{80}{100}\times\cfrac{25}{100}\times x=80,000\Rightarrow x=4,00,000\) kg

Knowledge Expert

· commented

· 1 Months ago

Dear student,
Given answer is correct.
Keep learning,
Team TR

Deepak

· commented

· 1 Months ago

25 remaining nahi hai mere bhai ques theek se read karo remaining hota toh 75 kardete ...answer is perfectly fine
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