Question

13. A girl walks 12 km at the speed of 3 km/h. What change should she make in her speed to
take (1) an hour less and (ii) an hour more to cover the distance?
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Answer 1

Answer:

Speed =3 km / hr

Distance =12Km then,

S= D / T

= 12/3

=4hr

I) time should be less than 1hr

t =3hr

d=12km

s =d/t

=12/3

4km

ii) An Hours more to be covered distance then t=5h

s=d/t

=12/5

=2.4km/hr

Answer 2

Step-by-step explanation:

hope it will help you

sweet girl!!