Management Aptitude Test Sep 2020 Paper

Question : 105 of 200

Marks: +1, -0

Out of the total production of iron from hematite, an ore of iron,

20 \%

of the ore gets wasted. Out of the remaining iron, only

25 \%

is pure iron. If the pure iron obtained in a year from a mine of hematite was

80000 {kg}

, then the quantity of hematite mined in the year is

Solution:

Let the total production of hematite be

x {kg}

.
Amount of ore gets wasted

=20 \%

x

Remaining amount

=80 \%

x

Amount of pure iron obtained

=\;{25}/{100} × \;{80}/{100} × x

=\;{1}/{5} x {kg}

According to the question,
Amountof iron obtained in a year

=80000 {kg}

∴ \;\; \;{1}/{5} x=80000

x=400000 {kg}

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