NCERT Solutions for Class 7 Maths Exercise – 15.4 Chapter – 15 Visualising Solid Shapes
Q1. A bulb is kept burning just right above the following solids. Name the shape of the shadows obtained in each case. Attempt to give a rough sketch of the shadow.
(i)
Solution:-
The shape of the shadow obtained from a ball is circle.
(ii)
Solution:-
The shape of the shadow obtained from a cylindrical pipe is rectangle.
(iii)
Solution:-
The shape of the shadow obtained from a book is rectangle
Q2. Here are the shadows of some 3-D objects, when seen under the lamp of an overhead projector . Identify the solid that the match each shadow .
(i)
Solution:-
Cricket balls , water bottle cap , Disc.
(ii)
Solution:-
Die , chalk box etc.
(iii)
Solution:-
Birthday cap etc.
(iv)
Solution:-
Books , Keyboard , Mobile etc.
Q3. Examine if the following are true statements:
- The cube can cast a shadow in the shape of a rectangle.
Solution:-
The above statements is true.
- The cube can cast a shadow in the shape of a hexagon.
Solution:-
The above statements is false.