Question

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

Answer 1

answer

sanjana speed = 12kmph.

time taken  = 20 mins = 1/3 hours.

distance = speed × time = 12 × 1/3 = 4km.

distance = 4km.

time = 15 mins = 1/4 hours.

speed = distance ÷ time = 4 × 4 = 16 kmph.

Answer 2

Answer:

12km/hr = avg speed

12 * 1/3 of an hr (20 mins)

distance of school = 4 km

d = v*t

d/t = v

4/1/4 = v

4*4 = v

16km/ hr = v