E. g. a 1. Sandstone is/common sedimentary
rock. It is made/particles of sand
that/cemented together. It mostly
contains quartz grains. Sandstone/be
yellow. brown, red or pink-coloured./Red Fort
in New Delhi is/of sandstone.
2 Do you/about a bird sanctuary?
It is/protected area where
birds/different parts of the
world come/nest and breed.
It is also a place where birds/
conserved and cared/
(a)
(b)
(a
(d)
(e)
e. g. know
(a)
(b)
lo
(d)
(e)
I want ans

4. find the geometric mean of 4 and 12. 24 8

Determine whether the following statements are true and give an explanation or counterexample. bold a. when using the shell method, the axis of the cylindrical shells is parallel to the axis of revolution. bold b. if a region is revolved about the y-axis, then the shell method must be used. bold c. if a region is revolved about the x-axis, then in principle it is possible to use the disk/washer method and integrate with respect to x or the shell method and integrate with respect to y.

In right ∆abc shown below, the midpoint of hypotenuse ac is located at d and segment bd is drawn. if ab = 12 and bc = 16, then explain why bd = 10. hint: consider what you know about the diagonals of a rectangle.