The derivative of with respect to is
2
- 1
0
- 2
B.
- 1
A sphere increases its volume at the rate of cc/s. The rate at which its surface area increases when the radius is 1 cm is
If 2i + 3j, i + j + k and i + 4j + 2k taken in an order are coterminous edges of a parallelopiped of volume 2 cu units, then value of is
- 4
2
3
4