Question

the width of a cloth is 17 m .calculate the length of the cloth required to make 2500 napkins,if each napkin requires a price of cloth of size 50 cm by 17 cm.

Answer 1

Solution:
Length of the cloth required to make a napkin = 50 cm
Breadth of the cloth required to make a napkin = 17 cm 
Area of each napkin = 50*17
Area of each napkin = 850 sq cm
Area of 2500 napkins = 2500*850 
= 2125000 sq cm
Area of the whole cloth material = Area of 2500 napkins
Width of the cloth material = 17 m or 1700 cm
So, length of the whole cloth material = Area/width
= 2125000/1700
Length of the cloth required to make 2500 napkins = 1250 cm or 12.5 m
Answer.

Answer 2

Answer:

l=1250cm

Step-by-step explanation:

$l = 50cm \\ b = 17cm \\ area \: of \: the \: cloth = l \times b \\ = 50 \times 17 \\ = 850 {cm}^{2} \\ area \: of \: whoe \: cloth \: material = 2500 \times 850 \\ = 2125000 {cm}^{2} \\ l = \frac{area}{width} \\ l = \frac{2125000}{1700} \\ l = 1250cm$