One packet of biscuits requires \(2\dfrac{1}{2}\) cups of flour and \(1\dfrac{2}{3}\) cups of sugar. Estimated total quantity of both ingredients used in 10 such packets will be
less than 30 cups
between 30 cups and 40 cups
between 40 cups and 50 cups
above 50 cups
Per packet total \(=2.5+1.667\approx4.167\) cups. For 10 packets \(\approx41.67\) cups → between 40 and 50.