Question

Meenakshee cycles to her school at an average speed of 12 km/h and takes 20 minutes to reach her school. If she wants to reach her school in 12 minutes, what should her average speed be? [3 MARKS]

Answer 1

Concept: 1 Mark
Application: 2 Marks

As the speed increases, the time taken decreases. Therefore, time and speed are inversely proportional.

$Speed\times time=constant$

$12\times 20=s\times 12$

$s=\frac{12\times 20}{12}$

$s=20km/h$