10 machines were bought in a factory. Out of them, 2 machines were of type A, 3 of type B and rest were of type C. The cost price of these machines is Rs 95000, Rs 60000 and Rs 50000 respectively. Find the mean cost price?

If a machine cost Rs. 10000 in 2015 and Rs. 15000 in 2018, then find the price relative.

A man sold a washing machine for Rs. 13200, thus earning a profit of 10%. Find the cost price of the machine.

A manufacturer produces two types of soaps using two machines A and B . A is operated for 2 minutes and B for 3 minutes to manufacture first type , while it takes 3 minutes on machine A and 5 minutes on machine B to manufature second type . Each machine can be operated at the most for 8 hours per day . The two types of soap are sold at a profit of Rs 0.25 and Rs 0.05 each respectively . Assuming that the manufactured can sell all the soaps he can manufacture , how many soaps of each type should be manufature per day so as to maximize his profit .

Cost price of A is twice the cost price of B. If the selling price of B is Rs.3600 and it is sold at the profit of 20%, then find the cost price of A.

The price of a washing machine, inclusive of Tax, is Rs 13,530/-. If the tax is 10%, find its basic (cost) price.

12 copies of a book were sold for Rs. 1800/- thereby gaining cost-price of 3 copies. The cost price of a copy is :