Radhika's mother gave her Rs 10.50 and her father gave her Rs.15.80,find the total amount given to Radhika by the parents.

In a development plan of a city, a contractor has taken a contract to construct certain houses for which he needs building materials like stones, sand etc. There are three firms A, B, C that can supply him these materials. At one time these firms A, B, C supplied him 40, 35 and 25 truck loads of stones and 10, 5 and 8 truck load of sand respectively. If the cost of one truckload of stone and sand are Rs 1200 and 500 respectively, then find the total amount paid by the contractor to each of these firms A, B, C separately.

A class room is 7 m long, 6.5 m wide and 4 m high. It has one door 3mxx1.4m and three windows 2mxx1m . The interior walls are to be white rushed. The contractor charges Rs 10.50 per square metre. Find the total cost of white washing.

Mother wants to divide Rs.36 amount her daughters Shreya and Bhoomika in the ratio of their ages.If age of Shreya is 15 years and age of Bhoomika is 12 years,find how much Shreya and Bhoomika will get.

Form the pair of linear equations in the following problems, and find their solutions (if they exist) by the elimination method : Meena went to a bank to withdraw Rs 2000. She asked the cashier to give her Rs 50 and Rs 100 notes only. Meena got 25 notes in all. Find how many notes of Rs 50 and Rs 100 she received.