ample 9 10000 workers were employed to construct a river bridge in four years. At the
end of first year, 10% workers were retrenched. At the end of the second
year, 5% of the workers at that time were retrenched. However to complete
the project in time, the number of workers was increased by 10% at the end of
the third year. How many workers were working during the fourth year?
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8th
Maths
Comparing Quantities
Increase and Decrease in Percentage
10000 workers were employed...
MATHS
10000 workers were employed to construct a river bridge in four years. At the end of first year 10% workers were retrencehed.At the end of the second year 5% of the workers at that time were retrencehed.However to complete the project in time the number of workers were increased by 10% at the end of the third year.How many workers were working during the fourth year?
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ANSWER
Initially No of worker =10000
After 1st year 10% worker left
therefore No of worker after 1st year =10000−10000×
100
10
=9000
After 2nd year 5% worker left
therefore No of worker after 2nd year =9000−9000×
100
5
=8550
After 3rd year 10% worker increase
therefore No of worker after 3rd year =8550+8550×
100
10
=9405
So the at the end of 4th year no of worker =9405
Answer:
Initially No of worker =10000
After 1st year 10% worker left
therefore No of worker after 1st year =10000−10000×
100
10
=9000
After 2nd year 5% worker left
therefore No of worker after 2nd year =9000−9000×
100
5
=8550
After 3rd year 10% worker increase
therefore No of worker after 3rd year =8550+8550×
100
10
=9405
So the at the end of 4th year no of worker =9405
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