১২৩২৩
If the radius of cylinder is halved and height is doubled, then what will be the curved surface area?
উত্তর
the same
১২৩২৫
The number of parallelograms that can be formed from a set of four parallel lines intersecting another set of three parallel lines is -
উত্তর
18
১২৩২৬
There are 5 red and 3 black balls in a bag. Probability of drawing a black ball is—
উত্তর
3/8
১২৩৩০
A square is inscribed in a circle of diameter 2a and another square is circumscribing circle. The difference between the areas of outer and inner squares is:
উত্তর
2a2