Assertion and reason

Exercise and reference answers

Questions

1. Reason

   Speed and time are in inverse proportion, so their product is constant.

   Verdict

   Both are true; the reason explains the assertion.

   Assertion

   Doubling the speed halves the time for a fixed distance.

2. Reason

   Quantity and cost are in direct proportion, so their ratio is constant.

   Verdict

   Both are true; the reason explains the assertion.

   Assertion

   Doubling the quantity of sugar doubles the cost.

3. Reason

   Workers and time are inversely proportional.

   Verdict

   The assertion is false and the reason is true.

   Assertion

   More workers means more time to finish a job.

Explanation