In a college, the ratio of the number of boys to girls is 8 : 5. If there are 160 girls, the total number of students in the college is
Let the number of boys and girls be 8x and 5x. Total number of students = 13x = 13 * 32 = 416.
The ratio of the number of boys to the number of girls in a school of 640 students, is 5 : 3. If 30 more girls are admitted in the school, then how many more boys should be admitted so that the ratio of boys to that of the girls, becomes 14 : 9.
If the base radius of 2 cylinders are in the ratio 3 : 4 and their heights are in the ratio 4 : 9, then the ratio of their volumes is:
If a : b = 2 : 3 and c : b = 5 : 6, then a : b : c is equal to:
If a : b = 2 : 5, c: b = 3 : 4, then a : b : c is equal to:
Two numbers are in the ratio 5 : 7. If the first number is 20, then the second number will be:
If x is the mean proportional between 12.8 and 64.8 and y is the third proportional to 38.4 and 57.6, then 2x : y is equal to:
If the radius of the circumcircle of an equilateral triangle is 8 cm, then the measure of radius of its incircle is:
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