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In-situ are of 1.5% Cu got diluted with waste rock of value 0.2% Cu. If the resultant extracted ore has 1.2% Cu, what is the percentage of dilution?
Seven students – P, Q, R, S, T, U, and V got the highest marks in Mathematics test among all students. Their marks out of 50 are 40, 42, 45, 46, 48, 50 (not necessarily in the same order). Two students have got the same marks as 46. P has neither got the lowest marks nor 46. Q has got the highest marks. U has got higher marks than P. R has got lower marks than T whereas T got lower than P. S has got lower marks than U. Who among the following has got the same marks as 46?
The following information is provided for an ore deposit:
Number of waste blocks = 10
Number of ore blocks = 5
Volume of each waste block, m3 = 600
Total cost of waste handling per m3 = Rs. 100
Tonnage of each ore block = 400
Total cost of ore handling per ton = Rs. 150
Sale price of ore per ton = Rs. 500
The net cash flow of mining the deposit in lakhs of rupees, is
Which of the following statements is always correct about an ideal chemostat?
P. Substrate concentration inside the chemostat is equal to that in the exit stream.
Q. Optimal dilution rate is lower than critical dilution rate.
R. Biomass concentration increases with increase in dilution rate.
S. Cell recirculation facilitates operation beyond critical dilution rate.
An ore block of length 30m and height 20m having an average width of 1.5m with sharp boundary walls is mined with a minimum mining width of 2m. If the tonnage factors are 3 t/m3 for ore, 2 t/m3 for wall rock and average grade of ore is 10%, the diluted grade of ore mined in percent is
Four students A, B, C and D distributed 30 marbles among themselves. No two students got equal number of marbles. No student got more than 10 marbles. No student got less than 5 marbles. A and C got odd number of marbles. B and D got even number of marbles. A got more marbles than B, C got more marbles than D, B got more marbles than D.  What is the number of marbles with A? 
Yuvraj has got more marks than Shakti. Neha has got less marks than Anamika. Swapnil has got more marks than Adil. Yuvraj gets less marks than Adil. Anamika and Shakti has got equal marks. Aditya has got more marks than Adil but less than only one person in the group. Who has got the highest and lowest marks?
There are six persons Saurav, Harshita, Jay, Ashwini, Jagannath and Sakshi, who got different marks in the examination. Ashwini got more marks than all of them. Jay got more marks than two of them. Jagannath got less marks than only Ashwini. Saurav got less marks than 5 persons. Harshita got more marks than Jay while Sakshi got less marks than Jay. How many persons scored more marks than Sakshi?
Ajinkya, Ramesh and Vaibhav got first, second and third rank. But not in this sequence. After asking them they replied two answers each. Out of which one is true and other is false. But not in the same sequence. Their answers are as following. Ramesh : I got first rank. Ajinkya got second rank. Vaibhav : I got first rank. Ramesh got second rank. Ajinkya : I got first rank. Ramesh got third rank. Which is not the rank of Ajinkya?
There are seven students A, B, C, D, E, F and G, who have got highest marks in aggregate in a class. They are ranked as 1 to 7 (not necessarily in the same order). F has neither got highest nor lowest rank. D has got one rank higher than B. There are three students who have got higher marks than C and G is one of them. A has got higher rank than G but not the highest one. Which students have got the highest and the lowest rank?