Triangle
A
B
C
with the given measurements is rotated in space about side
A
B
. Which answer gives the solid formed and its surface area?

In a box lenght 1m breadth 60 cm and height 40 cm small rectangular packets of dimension 5 cm into 8 cm into 10 cm are packed. how many such small packets can be packed in the big box?

What is the equation of the graph below? y=sec(x)-4

State one method by which you can recognize a perfect square trinomial.