Trisha has bought a book from the book stall of Milan dada. Milandada gave her discounts of 10% and 5% respectively. Let’s work out how much Trisha paid to Milandada if the M.R.P. of the book was Rs. 200.

I have bought a dozen of exercise books from the Banerjee book stall of our locality for Rs. 90 only. Let’s calculate the price of such 18 exercise book by the Rules of three.

When water freezes into ice, it increases in volume by 10%. Let’s work out in percentage how much it will decrease in volume if the ice melts into water.

Today my father has bought 15 kg. of rice, for Rs. 390. Let’s work out using the Rule of Three method how much he would require if he would have bought the same quality of 17 kg of rice

My friend Rabeya's father has a furniture shop in Andul.I often visit their shop with Rabeya,This time . I found many people working in their shop.Rabeyas father has got orders from 7 schools, to make chair, tables and almirahs.From each school he got orders for 10 chairs, 10 tables and 10 almirahs for keeping books.Let me find what is the total amount of order Rabey's father has got from 7 schools.Total cost of 10 chairs,10 table and 10 almirahs is Rs. 11,42,575.

A trolley of mass 200 kg moves with a uniform speed of 36 km/h on a frictionless track. A child of mass 20 kg runs on the trolley from one end the other (10 m away) with a speed to 4m/s relative to the trolley in a direction opposite to the trolly's motion and jump out of the trolly. What is the final speed of the trolly? How much has the trolly moved from the time the child begins to run?