For the following questions answer them individually
If $$\frac{a}{b}=\frac{25}{6}$$, then the value of $$\frac{a^{2}-b^{2}}{a^{2}+b^{2}}$$ is
Two trains start at the same time from Aligarh and Delhi and proceed towards each other at the rate of 14 km and 21 km per hour respectively. When they meet, it is found that one train has travelled 70 km more than the other. The distance between two stations is
The list price of an electric fan is ₹300. If two successive discounts of 15% and 10% are allowed, its selling price would be
Height of a prism-shaped part of a machine is 8 cm and its base is an isosceles triangle, whose each of the equal sides is 5 cm and remaining side is 6 cm. The volume of the part is
The rate of simple interest per annum of bank being decreased from 5% to $$3\frac{1}{2}$$ %, the annual income of a person from interest was less by ₹105. The sum deposited at the bank was