Using a system of equations, it is found that the trains will be side by side in 15 seconds.
<h3>What is a system of equations?</h3>
A system of equations is when two or more variables are related, and equations are built to find the values of each variable.
In this problem, the <em>equations </em>are:
They will be side-by-side when:
Hence:
The trains will be side by side in 15 seconds.
More can be learned about system of equations at brainly.com/question/24342899
Answer:
The capacity of water in the tank is 300 litres
Step-by-step explanation:
Let the unknown capacity be x
4/5 of x-190 litres = 1/6 of x
4x/5-190 litres = x/6
Cross x/6 and 190 litres over the equation sign
4x/5-x/6 = 190 litres
The LCM is 30
(24x-5x)/30 = 190 litres
19x/30 = 190 litres
Cross multiply
190 litres*30 = 19x
5700 litres= 19x
Divide through by 19
x = 300 litres
Area=pi r squared
area=3.14 x 10squared
area= 314
the answer is 314
Knowing that cos(45°) = 1/√2 is the way forward.
The last step in the equation may not be obious, but the trick here is to multiple numerator and denominator with (1-√2), then the denominator has the special product (a+b)(a-b) = a²-b².
