A can do a work alone in 30 days. He left after doing half the work. If B alone can complete the entire work in 16 days, then how many days will B take to complete the remaining work?

If 0 ≤ θ ≤ 90⁰ and 4cos²θ - $$4{\sqrt { 3} \ }cosθ$$ + 3 = 0, then the value of θ is : 

The sum of two numbers is 45 and their ratio is 7: 8. The two numbers are:

Direction: Study the following graph carefully and answer the following questions.

What is the difference between average demand and average production of the five companies taken together?

The difference between two whole numbers is 110 and the numbers are in ratio 2 : 7. Find the sum of the two numbers.

The length of the common chord of two circles of radii 30 cm and 40 cm whose centers are 50 cm apart is (in cm) 

The population of a city in the year 2020 was 2,00,000. The rate of growth of population is 8% per annum. Find the population of that city in the year 2022.

If $$ {0.7\over 1-6c}=-0.2$$ then what is the value of c.