In how many ways Barcelona’s football team captain and vice-captain be elected from a team of 15 men?

To do this, if captain is selected first, then we have 15 ways of doing this. For election of vice-captain, we have 14 ways left, because 1 way is already consumed. So, the required answer = 14 × 15 = 210

If the ratio of areas of two circle is 4:25, then the ratio of their circumferences will be:

If base of a prism is square of side 5 cm & height is 30 cm . What is the volume of prism?

The side of a square is increased by 40%. Find the percentage change in its area?

The circumference of the two circles is 198 cm and 352 cm respectively. What is the difference between their radii?

The area of a rhombus is 168 cm

^{2}. The length of one of its diagonals is 28 cm. The length of the other diagonal is:

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