Let us assume E was the expenditure in 1994.
As we can see in the graph given that,
Profit = 15 % ,
Income in 1994 = 160
Then according to question,
E + E x 15 % = 160
E + E x 15 /100 = 160
(100E + E x 15 ) /100 = 160
115E / 100 = 160
115E = 160 x 100
E = 160 x 100 / 115
E = 139.13
Expenditure in 1994 E = 139.13 ? 140 Million
Let us assume E was the expenditure in 1997.
As we can see in the given graph that,
Income in 1997 = 190
Profit = 25 % (Given in the question.)
Then according to question,
E + E x 25 % = 190
E + E x 25 /100 = 190
(100E + E x 25 ) /100 = 190
125E / 100 = 160
125E = 190 x 100
E = 190 x 100 / 125 = 190 x 4 / 5 = 38 x 4
E = 152
Expenditure in 1997 E = 152 Million
Total expenditure in 6 years = ( expenditure in 1993 + expenditure in 1994 + expenditure in 1995 + expenditure in 1996 + expenditure in 1997 + expenditure in 1998 ).
As we can see in the given graph that,
Income in 1993 = 120
Profit = 7.5 %
Then Expenditure in 1993 = 120 X 100 / 107.5
Similarly
Expenditure in 1994 = 160 X 100 / 115
Expenditure in 1995 = 130 X 100 / 122.5
Expenditure in 1996 = 170 X 100 / 117.5
Expenditure in 1997 = 190 X 100 / 120
Expenditure in 1998 = 150 X 100 / 127.5
Total Expenditure in 6 years = ( 120 X 100 / 107.5 ) + ( 160 X 100 / 115 ) + ( 130 X 100/122.5 ) + ( 170 X 100 / 117.5 ) + ( 190 X 110 / 120 ) + ( 150 X 100/127.5 )
Total Expenditure in 6 years = 111.6 2 +139.13 + 106.16 + 144.68 + 158.33 + 117.64
Total Expenditure in 6 years = 777.56
Average expenditure per years = 777.56 / 6 = 12 .59 ? $ 130 Million
As we can see in the graph that
Total production by unit F in year 2001 and 2002 together = ( 70 + 85 ) = 155 Million tons
Similarly
Total production by unit D in year 2001 and 2002 together = ( 95 + 100 ) = 195 Million tons
? Required percentage = (Total production by unit F in year 2001 and 2002 together x 100 / Total production by unit D in year 2001 and 2002 together )
? Required percentage = ( 155 x 100 / 195 )
=79.487 ? 79.49
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