Quantitative Aptitude - Arithmetic Ability Questions

P and Q can do a project in 150 and 100 days respectively. In how many days can they complete 60% of the project if they work together?

Parvesh is three times as efficient as Dinesh. Parvesh takes 20 days less than Dinesh to complete a book. If both of them work together, then in how many days the book will be completed?

When a discount of 20% is given on a sweater, the profit is 28%. If the discount is 14%, then the profit is

A trader had 2000 kgs of rice. He sold a part of it at 10% profit and the rest at 16% profit, so that he made a total profit of 14.2%. How much rice (in kg) did he sell at 10% profit?

Travelling at 4/5th of his usual speed, a man is 15 minutes late. What is his usual time to cover the same distance?

M is thrice as good as workman as N and together they finish a piece of work in 30 days. In how many days will M alone finish the work?

What is the value of 20% of 500% of 50?

PQRS is a square whose side is 20 cm. By joining opposite vertices of PQRS are get four triangles. What is the sum of the perimeters of the four triangles?