Question

answer this question step by step

Answer 1

4 sq.m. of cloth=140g of yarn
1 sq.m. of cloth=140/4 g of yarn= 35g of yarn
25 sq.m. of cloth=35*25g of yarn=875g of yarn

1000g=1kg
1g=1/1000kg
140g=14/100kg

14/100kg of yarn=4sq.m. of cloth
1kg of yarn=4*100/14sq.m. of cloth
21kg of yarn=21*4*100/14sq.m. of cloth
=600sq.m. of cloth