The cost of manufacturing x water pumps is Tk. 9000+400x. The amount received by selling these x water pumps is Tk. 500x. Water is the least number of water pumps that must be manufactured and sold so that the amount received is at least equal to the manufacturing cost?

1. The cost of manufacturing x water pumps is Tk. 9000+400x. The amount received by selling these x water pumps is Tk. 500x. Water is the least number of water pumps that must be manufactured and sold so that the amount received is at least equal to the manufacturing cost?

[DBBL Probationary Officer-2011 : 2011]

1. 50

2. 60

3. 90

4. 100

5. None of these

Answer

Comments