Rana wants to buy shirts for summer. Should he buy cotton shirts or shirts made from synthetic material? Advice Rana , giving your reason.

Hasan buys two kinds of cloth materials for school uniforms,shirt material that costs him₹50 per metre and trouser material that costs him₹90 per metre.For every 3 metres of the shirt material be huys 2 metres of the trouser material.He sells the materials at 12% and 10% profit respectively.His total sale is ₹36,600.How much trouser material did he buy?

Reetu is purely vegetarian but her husband Rohit likes non-vegetarian food. He regularly buys nonvegetarian food (fish, meet, eggs etc.) and store it in fridge. The intermixing of odours creates problem for Reetu. Their daughter Rihana is a student of science. One day Rihana suggested her mother to put some small pieces of charcoal in the fridge as she thinks that this will solve the problem to some extent. (i) Do you think by putting some small pieces of charcoal in the fridge will solve the problem of intermixing of odours. Give reason for your answer. (ii) What are the values associated with Rihana's suggestion ?