Two friends are knitting scarves. Each scarf has 3 rectangles, and 2/3 of the rectangles have stripes. If the friends are making 10 scarves, how many rectangles do they need? How many rectangles will have stripes?
10 * 3 = 30 rectangles
2/3 * 30 = ___
To find the number of rectangles the friends need, we need to multiply the number of scarves by the number of rectangles per scarf. In this case, they are making 10 scarves, and each scarf has 3 rectangles. Therefore, the total number of rectangles they need is 10 x 3 = 30 rectangles.
To determine the number of rectangles that have stripes, we first need to find how many rectangles per scarf have stripes. It is given that 2/3 of the rectangles have stripes. So, out of the 3 rectangles in each scarf, 2 have stripes.
Next, we multiply the number of rectangles with stripes per scarf (2) by the total number of scarves (10) to find the total number of rectangles with stripes. Therefore, the number of rectangles with stripes is 2 x 10 = 20 rectangles.