Question

Sudha bought an oil can and gave 1/5 of the oil from the can to her neighbour . By the end of the month ,she found that 3/20 of the oil in the can was left . Find what part of the oil in the can she used in the month

Answer 1

Answer

Total oil =1

gave oil =1/5

left oil = 3/20

used oil = 1-1/5-3/20

13/20

Answer 2

The amount of oil used by Sudha in a month = 13/20

Given:

Sudha bought an oil can

She gave 1/5 of oil from the can to her neighbor

The amount of oil that left end of the month = 3/20

To find:

The amount of oil she used in month

Solution:

Let the amount of oil in can is 1 unit

Given this Sudha gave 1/5 of oil is given to her neighbor

then the remaining oil = 1 - 1/5 = 4/5

Let us assume that Sudha used x unit amount of oil is in remaining oil then the amount of remaining oil will be equals to 4/5 - x

From given data,

Remaining oil = 3/20

=> 4/5 - x = 3/20

=> x = 4/5 - 3/20

=> x = [4(4)-3]/20

=> x = (16-3)/20

=> x = 13/20

Therefore,

Therefore,The amount of oil used by Sudha in a month = 13/20

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