Forum

Maximizing Area – Calculus

A piece of wire 20 cm long is to be cut into two pieces. One piece is bent into a square, and the other into a circle. How should the wire be cut so that the total area of the square and circle is maximized?

30/10/2024

Mathematics

12th (Science)

Profit in Business – Derivatives

A company’s profit P(x) from selling x units is given by P(x) = -5x^2 + 150x – 1000. Find the number of units that should be sold to maximize profit.

30/10/2024

Mathematics

12th (Science)

Minimizing Cost – Optimization

A rectangular garden with an area of 200 square meters is to be fenced on three sides, with one side left open. The fencing on two adjacent sides costs ₹5 per meter, while the third side costs ₹10 per meter. Find the dimensions of the garden to minimize the cost.

30/10/2024

Mathematics

12th (Science)

Interest Calculation – Differentiation

The amount A in a bank account grows according to the formula A = Pe^(rt), where P is the principal, r is the rate, and t is the time in years. If P = 1000 and r=0.05, find the rate of change of A with respect to t when t = 3.

30/10/2024

Mathematics

12th (Science)

Profit Maximization – Linear Programming

A factory produces two types of goods, A and B. Each unit of A requires 2 hours, and each unit of B requires 3 hours of labor. The factory has a total of 60 hours available per day. If profit per unit of A is ₹40 and per unit of B is ₹50, how many units of each should be produced to maximize profit?

30/10/2024

Mathematics

12th (Science)

Environmental Chemistry – Greenhouse Gases and Global Warming

Define greenhouse gases. Explain their role in global warming and suggest ways to reduce greenhouse gas emissions.

30/10/2024

Chemistry

12th (Science)

Surface Chemistry – Catalysis

Define catalysis and explain how heterogeneous and homogeneous catalysts work with examples.

30/10/2024

Chemistry

12th (Science)

Organic Chemistry – Cannizzaro Reaction

Describe the Cannizzaro reaction. Provide a reaction example and explain its mechanism.

30/10/2024

Chemistry

12th (Science)

Carboxylic Acids – Acidity

Explain why carboxylic acids are more acidic than alcohols. Discuss the effect of substituents on their acidity.

30/10/2024

Chemistry

12th (Science)

Aldehydes and Ketones – Distinction Tests

List two chemical tests that distinguish aldehydes from ketones. Describe the reactions involved in each test.

30/10/2024

Chemistry

12th (Science)