C. 2:3 because the original ratio is 12:18, but to complete this ratio you would need to simplify the ratio to 2:3.
Let's say the cylinders are
A = first cylinder
B = second cylinder
B has some volume, the volume is "x"
what's 7/8 of "x"? well (7/8)x
what's 8 less than that? well (7/8)x - 8
A has a volume of 216
we also know that, A's volume is (7/8)x - 8
thus
0.45 Km / min and 0.9 Km
note that 1 hour = 60 minutes
divide by 60 to get Km / min
27 Km / hour = = 0.45 Km / min
distance in 2 minutes = 0.45 × 2 = 0.9 Km
The riddle given by Dr. Watson to Sherlock Holmes is:
217 is to 335
896 is to 543
345 is to ____
We need to find the missing number of the third pair of the riddle. This is a ratio and proportion problem.
217/ 335 = 896/ 543 = 345 / x
The value of x is 209.