6. A box contains 18 red balls and 27 yellow balls.
a) Evaluate the ratio of red balls to yellow balls
b) Evaluate the ratio of red balls to total number of balls
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Find the perimeter of a rectangle whose length = 11 m 45 cm and breadth = 23m 58 cm.A chalk contains Calcium, Carbon and Oxygen in the ratio
10:3:12. Find the percentage of Carbon in the chalk.
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