Question

Question 100

Rana has 6 $\frac{1}{4}$ kg of cotton wool for making pillows. If one pillow takes 1$\frac{1}{4}$ kg, how many pillows can she make?

Answer 1

Given Rama has $6\frac{1}{4}$ kg of cotton for making pillows
i.e.$6\frac{1}{4}kg=\frac{(6\times 4)+1}{4}=\frac{24+1}{4}=\frac{25}{4}$ kg
Where one pillo we can be made from 1 $\frac{1}{4}i.e.1\frac{1}{4}kg=\frac{(1\times 4)+1}{4}=\frac{4+1}{4}=\frac{5}{4}$kg
$\therefore Numberofpillows=\frac{Totalquantityofcottonavailable}{Cottonusedinonepillow}=\frac{\left(\frac{25}{4}\right)}{\left(\frac{5}{4}\right)}=\frac{25}{4}\times \frac{4}{5}=\frac{25}{5}=5$

[$becausedivisionisreverseofmultiplication$]