A. 16
B. 20
C. 24
D. 28
Let the fourth proportional to 5, 8, 15 be z
Then, 5 : 8 : 15 : z
=> 5z = (8 x 15)
=> z = 24
Two number are in the ratio 3 : 5. If 9 is subtracted from each, the new numbers are in the ratio 12 : 23. The smaller number is:
In a bag, there are coins of 25 p, 10 p and 5 p in the ratio of 1 : 2 : 3. If there is Rs. 30 in all, how many 5 p coins are there?