A man got a 10% increase in his salary. If his new salary is Rs 1,54,000, find his original salary.

Puneet Sharma starts his job in a school with a certain monthly salary and earns a fixed increment every year. If his salary was rs.15000 after 4 years service and rs. 18000 after 10 years of service. What was his starting salary and what is the annual increment?

Meeta saves Rs. 400 from her salary. If this is 10% of her salary. What is her salary?

The rate at which monthly salary of a person increases annually is in A.P. If he was drawing $4500 p.m. in his 1 1th year of service and $ 6900 p.m. in his 27th year of service, find salary at start and annual increment. Also find monthly salary after 30 years.

Sohan bought a second hand refrigerator for Rs 2,500, then spent Rs 500 on its repairs and sold it for Rs 3,300. Find his loss or gain per cent.