Assertion and reason

Exercise and reference answers

Questions

1. Reason

   Its six faces form three matching opposite pairs.

   Verdict

   Both are true; the reason explains the assertion.

   Assertion

   The cuboid surface area formula carries a factor of 2.

2. Reason

   Paint covers the outside faces rather than filling the inside.

   Verdict

   Both are true; the reason explains the assertion.

   Assertion

   Painting a box needs surface area, not volume.

3. Reason

   A cube has six identical square faces.

   Verdict

   The assertion is false and the reason is true.

   Assertion

   A cube's volume is 6l².

4. Reason

   Volume multiplies three lengths together.

   Verdict

   Both are true; the reason explains the assertion.

   Assertion

   Volume answers are given in cubic units.

Explanation