Two students appeared for an examination. One of them secured 20 marks more than the other and his marks were 55% of the sum of their marks. The marks obtained by them are : 

The sum of 10 terms of the arithmetic series is 390. If the third term of the series is 19. Find the first term

Given that 10^0.48 = x, 10^0.70 = y and x² = y², then the value of z is close to

Find the value of a and b if (x-1) and (x+1) are factors of x⁴+ax³-3x²+2x+b

The volume of a sphere and an elliptical cylinder are the same. The radius of the sphere and cylinder are 21 cm and 14 cm respectively. What is the height of the cylinder?

A mixture of 40 liters of milk and water contains 30% water. How much milk should be added to this mixture so that the new mixture contains 80% milk?

Direction: Study the double bar graph given below and answer the questions.

The class having maximum number of participants in exhibitions:

Perimeter of rectangle with length 76 meter and breadth 48 meter: