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:
Three numbers are in the ratio 1/4 : 5/9 : 7/12, The difference between the greatest and the smallest number is 180, Find the sum of all the three numbers.
How much will be decreased to each terms of ratio 16 : 19, so that it will be 7 : 6?
A's salary increases in the ratio 8 : 11. If his new salary is ₹33,000, then what was his original salary (in ₹)?
If 25, 35 and p are in continued proportion, then the value of p is ...........
What is the ratio of the mean proportional between 4.8 and 10.8 and the third proportional to 0.4 and 2.4?
If a : b = 5 : 3, then (8a — 5b) : (8a + 5b) is equal to:
If a : b = 5 : 8 and c : b = 4 : 3, then a : b : c is equal to:
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.
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