b= cost of 1 book , c=cost of 1 copy
9b + 13c = 258 ;;; 13b + 9c = 300 ;;
solving we get b=Rs. 17.93
The cost of a book and a notebook are 100 rupee and 40 rupee respectively. If a shopkeeper gives a discount of 10% and 4% in the two items respectively. Then what is the total cost of 10 books and 4 notebooks?
A retailer sells two items having cost prices Rs. 1200 and Rs. 1500 respectively. He offers discount of 8% on both items. The ratio between the marked price of these items is 8:9 respectively. If the total profit earned by a retailer is Rs. 428, then what is the difference between the marked price (in Rs) of both items?
If 4 + 1 = 45 3 + 2 = 65 4 + 3 = 127 5 + 2 = 107 then 6 + 3 =?
The width of all the three lines of the letter H is 3 mm. Length of two side lines are 6 mm each and that of the middle line is 5 mm. The cost of the letter H in the birthday cake is 18 rupee/mm^2 in Golden shining. What will be the total cost for writing H in the cake?
