Question

Disha cycles to her school at an average speed of 12 km/hr. It takes her 20 minutes to reach the school. If she wants to reach her school in 15 minutes, what should be
her average speed?​

Answer 1

$\bold\red{\boxed{Solution}}$

$speed = \dfrac{distance}{time}$

$\Rightarrow Distance = speed × time$

$So\:, distance\:to\:the\: school \:= 12km/hr × 20min$

$\Rightarrow 12km/hr × \dfrac{20}{60}Hour = 4km$

$So \:we \:have\: to \:cover \:4km\: in\: 15\: minutes,$

$speed = \dfrac{4km}{15min}$

$= \dfrac{4km}{(\dfrac{15}{60}hr)} = 16km/hr$

Answer 2

hope it help full।।।। ।।।