Answer:
value of x is 20
Step-by-step explanation:
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Answer:
18
Step-by-step explanation:
2 x 3^2
2 x 9
18
The answer is 45 because 45-15=30, therefore x=45.
You do the reverse and divide the 2 values to find out the last one
72/9 = 8
Do you get it?
Answer:
3 metres
Step-by-step explanation:
If we draw this out, we'll see that there are actually two similar right triangles (see attachment), which means that we can set up a proportion.
The height of the lookout tower corresponds to the height of the wooden column, while the shadow of the lookout tower corresponds to the shadow of the wooden column. We can then write:
(height of lookout tower) / (shadow of tower) = (height of column) / (shadow of column)
16 / 12 = 4 / x , where x is the shadow / unknown we want to find
Cross-multiply:
16x = 48
x = 3
The answer is thus 3 metres.