18 necklaces in 3 hours
18/3 = 6
6 necklaces in 1 hour
hope this helps
Answer:
forst find the area of the whole rectangle and then the area of the unshaded triangles then add the area of the two triangle and subtract it with the area of the rectange
Step-by-step explanation: area of rectangle is length × breadth and area of triangle is 1/2 × base × height
