exam Maths Puzzle

Suppose q is the number of workers employed by Simplex Ltd. for one of its projects. The average cost of production c is given by c=
q2
3
+
5q
2
−150+
75
q
. In the interest of the company, it should employ __________ workers.

A.

5

B.

4

C.

7

D.

10

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exam Other Question

Two taps can fill a tank in 12 min and 18 min respectively. Both the taps are kept open for 2 min and then the tap that fills the tank in 12 min is turned off. In how many more minutes will the tank be filled?

A.

9

B.

12

C.

13

D.

10 Pankaj can produce one unit in 15 days, while Bharti can do the same in 12 days. After producing one unit, working together, they received Rs. 90, which they distributed amongst themselves in proportional to their efficiency. If they work for 20 days, and sell the produce, then Bharti should receive

A.

Rs. 120

B.

Rs. 140

C.

Rs. 150

D.

Rs. 160