pls give answer for this. ISA-SKILL TEST (HELEN THE CYCLIST).
Q Helen has just got a new bike. It has a speedometer which sits on the handlebar.
The speedometer can tell Helen the distance she travels & her average speed for a trip.
Ia. Helen rode 6 km to her aunt's house. Her speedometer showed that she had averaged 18 kmfhr for the
whole trip.
Calculate the time taken by Helen to reach her aunt's house.
lb-On one trip, Helen rode 8 km in the first 20 minutes & then 6 km in the next 10 minutes.
Which of the following statement is correct?
a) Helen's average speed was greater in the first 20 minutes than in the next 10 minutes.
b) Helen's average speed was same in the first 20 minutes than in the next 10 minutes.
c) Helen's average speed was less in the first 20 minutes than in the next 10 minutes.
d) It is not possible to tell anything about Helen's average speed from the given information.