If height of a cone is tripled and radius is doubled then its volume will become ----- times.
12
8
4
2
A solid sphere of radius 3cm is melted and then recast into small spherical balls each of diameter 0.6cm. Find the number of small balls thus obtained.
250
1000
1200
1500
The diameter of a garden roller is 1.4m and it is 2m long. How much area will it cover in 5 revolutions? (Take Π=22/7)
44 m2
40 m2
22 m2
14 m2
A cone of height 15cm and base diameter 30cm is curved onto a wooden sphere of radius 15cm. Then the percentage of wasted wood is
50%
75%
40%
25%
If the radius of a sphere is half of the radius of another sphere, then their respective volumes are in the ratio
1 : 8
2 : 1
1 : 2
8 : 1
A hemispherical depression is cut from one face of a cubical wooden block such that the diameter l of the hemisphere is equal to the edge of the cube. Determine the surface area of the remaining solid.
l2/2(26+Π)
l2/4(24+Π)
l2/2(26+Π2)
l2/4(26+Π)
A cubical block of side 7cm is surrounded by a hemisphere. What is the greatest diameter the hemisphere can have? Find the surface area of the solid.
255.8 cm2
332.5cm2
320.5cm2
413.6cm2
If radius of a sphere is doubled then its volume becomes ---- times.
1
A wooden article was made by scooping out a hemisphere from each end of a cylinder. If the height of the cylinder is 10cm and its base is of diameter 7cm, find the total surface area of the article when it is ready.
370 cm2
371 cm2
373 cm2
374 cm2
The diameter of a copper sphere is 6cm. The sphere is melted and is drawn into a long wire of uniform circular cross-section. If the length of the wire is 36cm, find its radius.
1cm
1.5cm
2cm
3cm
