Kerala Board Solutions for Chapter: Solids, Exercise 1: Exercise 1

A square of side $5$ centimetres, and four isosceles triangles of base $5$ centimetres and height $8$ centimetres, are to be put together to make a square pyramid. How many square centimetres of paper is needed?

A toy is in the shape of a square pyramid of base edge $16$ centimetres and slant height $10$ centimetres. What is the total cost of painting $500$ such toys in $₨$, at $80$ rupees per square metre?

The lateral faces of a square pyramid are equilateral triangles and the length of a base edge is $30$ centimetres. What is its surface area?

The perimeter of the base of square pyramid is $40$ centimetres and the total length of all its edges is $92$ centimetres. Calculate its surface area in square centimetres.

Can we make a square pyramid with the lateral surface area equal to the base area?