The weight of 72 books is 9 kg what is the weight of 40 such books?

(a) Let the purchased amount be 1100 kg and the cost price of 1100 kg be  Rs. x. Therefore, he pays for 1000 kg and buys 1100 kg. Cost price of 1000...

(b) Let us take books A and B as one i.e., they are always continuous.  Now, number of books = 4 – 2 + 1 = 3  These three books can be...

(b) mass remains constant and only the weight is lesser 

(b) 4  3  1  2 

Books sold in first week = 2,85,891  Books sold in second week = 4,00,768  Total books sold = 285891+400768 = 6,86,659  Since, 4,00,768,> 2,85,891  Therefore sale of second week is greater than that of...

Number of books in each self = 52

The correct answer is (A) 2:5

First we take books of a particular subject as one unit. Thus there are 4 units which can be arranged in 4! = 24 ways. Now in each of arrangements,...

(1) (a) ↔ (ii) (b) ↔ (iii) and (c) ↔ (i) (2) (a) ↔ (iii) (b) ↔ (i)  (c) ↔ (iv),  (d) ↔ (ii) (3) (a) ↔ (iv) (b) ↔ (iii) (c) ↔ (ii), (d) ↔ (i) (4) (a) ↔ (i)  (b)...

Total number of English books = 336  Total number of mathematics books = 240  Total number of science books = 96  ∴ Number of books stored in each stack = HCF (336, 240,...