Given:
A music store has the following:
40 trumpets
39 clarinets
24 violins
51 flutes
16 trombones
We will write the following ratios:
trumpets to violins =
What is the value of 9 + 21 (13 + 5)?
2 answers:
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Given:
A pilot can travel 450 miles with the wind in the same amount of time as 360 miles against the wind.
Pilot's speed in still air is 315 miles per hour.
To find:
The speed of the wind.
Solution:
Let the speed of wind be x miles per hour.
Speed with wind = 315+x miles per hour
Speed against wind = 315-x miles per hour
We know that,
According to the question,
Divide both sides by 90.
By cross multiplication, we get
Divide both sides by 9.
Therefore, the speed of wind is 35 miles per hour.