Q. 17

If we rotate a ri A. cone of height 5 cm, base 3 cm

B. triangle of height 5 cm, base 3 cm

C. cone of height 5 cm, base 6 cm

D. triangle of height 5 cm, base 6 cm

Class 7th NCERT - Exemplar Mathematics 12. Practical Geometry Symmetry and Visualising Solid Shapes

Answer :

When a right angled triangle of height 5 cm and base 3 cm is rotated about its height in full turn, then we will get a cone of height 5 cm and base of radius 3 cm.

So the correct answer is A.

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If we rotate a ri A. cone of height 5 cm, base 3 cmB. triangle of height 5 cm, base 3 cmC. cone of height 5 cm, base 6 cmD. triangle of height 5 cm, base 6 cm

If we rotate a ri A. cone of height 5 cm, base 3 cm

B. triangle of height 5 cm, base 3 cm

C. cone of height 5 cm, base 6 cm

D. triangle of height 5 cm, base 6 cm