a drum full of kerosene oil has a capacity of 99 litres. if 33 1 upon 4 litres of oil is taken from the drum find the remaining oil in the drum.
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Answer:
90 litres.
Explanation:
Let the total capacity be
x
.
According to the question,
(
3
x
4
)
−
15
=
(
7
x
12
)
3
x
−
60
4
=
(
7
x
12
)
3
x
−
60
(
12
)
=
(
7
x
)
×
4
36
x
−
720
=
28
x
36
x
−
28
x
=
720
8
x
=
720
x
=
90
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