If 1 + sin² A = 3 sin A cos A, then what are the possible values of tan A?

If 40% of a number is equal to 3 / 5th of another number, what will be the ratio of the first number and the second number?

Sarita started a boutique investing an amount of 50,000. Six months later Neeta joined her with an amount of 80,000.  At the end of one year they earned a profit of 18,000. What is the Sarita’s share in the profit?

Simplify the following equation
$$ {\sqrt{(1-sin^{2}θ) ÷{(1-cos^{2}θ)}}}$$

Directions-Study the following diagram and answer the four questions.

The no. of students securing marks in the range 90-100

A boat covers 24 km upstream and 36 km downstream in 6 hours, while it covers 36 km upstream and 24 km downstream in $$6{1\over 2}$$ hours. The speed of the current is: 

The perimeter of the five squares is 24 cm, 32 cm, 40 cm, 76 cm, and 80 cm, respectively. What will be the perimeter of a square whose area is equal to the sum of the area of these squares?

Population of a city is 7000. In next year the population is increased by 8%, then find the new population?