For the following questions answer them individually
"The difference between the CI and the SI on a sum of money lent for 2 years at 20% interest per annum is ₹ 80. The sum is:"
The price of a book is first increased by 8% and later decreased by 8%. What is the percentage change in the price of the book?
A book with a marked price of ₹600 is available at a discount of 18%. What is the discount given?
The price of a pen is first increased by 15% and later on the price was decreased by 20% due to reduction in sales. Find the net percentage change in the final price of a pen.
Simplify the following expression.
$$\left(0.14\times0.14\right)-\left(2\times0.14\times5.14\right)+\left(5.14\times5.14\right)$$
The base of a hemispherical bowl has a circumference of 132 cm. Find the capacity of the bowl.
(Use $$\pi = \frac{22}{7}$$)
Solve $$\frac{\left(6.9\right)^{3} + \left(2.7\right)^{3} + \left(5.8\right)^{3} - 3 \times 6.9 \times 2.7 \times 5.8}{\left(6.9\right)^{2} + \left(2.7\right)^{2} + \left(5.2\right)^{2} - \left(6.9\right)\left(2.7\right) - \left(2.7\right)\left(5.8\right) - \left(5.8\right)\left(6.9\right)}$$
Study the given table and answer the question that follow.
The following table gives the month- wise number of different types of scooters produced by a company during the first six months of 1992.