Question Text
Question 1 :
A cuboidal vessel is 10 m long and 8 m wide. How high must it be made to hold 380 cubic metres of a liquid?
Question 2 :
Find the volume of the right circular cone with radius 3.5 cm, height 12 cm.
Question 3 :
In a cylinder, if radius is halved and height is doubled, the volume will be:
Question 4 :
A semi-circular sheet of metal of diameter 28cm is bent to form an open conical cup. Find the capacity of the cup.
Question 5 :
The curved surface area of a right circular cylinder of height 14 cm is 88 $cm^2$ . Find the diameter of the base of the cylinder. Assume $\pi$ =$\frac{22}{7}$.
Question 6 :
A cylindrical roller 2.5 m in length, 1.75 m in radius when rolled on a road was found to cover the area of 5500 $m^2$ . How many revolutions did it make?
Question 7 :
A village, having a population of 4000, requires 150 litres of water per head per day. It has a tank measuring 20 m × 15 m × 6 m. For how many days will the water of this tank last?
Question 8 :
Find the surface area of a sphere of diameter 21 cm.
Question 9 :
If we cut out many of the plane figures and stack them up in a vertical pile is called ______
Question 10 :
Find the surface area of a sphere of diameter 3.5 m.