Question
The ratio between the number of books and pencils is 7:5
and the ratio of cost of per book and pencil is 3:2 then find the percentage by which total cost of book is greater than the total cost of pencil.Solution
Number = books: Pencil = 7x : 5x Cost = books: pencil = 3y : 2y Total cost = books: Pencil = 21xy : 10xy Required % = [(21xy-10xy)/10xy] × 100 = 110%
20.22 × 11.99 + 140.15 = ?
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(74.93% of 640.11 + 3/4 of 359.79)² - (1/3 of 80.87 × 2)² = ?
[(120.96 × 12.09) ÷ ?] ÷ 6 = 19.96% of 55.07
620.15 + 1279.98 + ? × (4.79)2 = 149.95% of 1600.14
(8.86)² × (15.01)² ÷ √624.99 = 9?
(√360.99 + 161.14) ÷ 5 × 249.98 = ?
420.11 ÷ 13.98 × 5.14 – 124.9 = √?Â