102 pencils need to be put into packets of 12. How many full packs can be made?
2 answers:
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Answer:
(a) 10.5 miles/hour
(b) 6.5 miles
Step-by-step explanation:
(a)
Carla runs
time taken by Carla=15 minutes=15/60 hours.
Hence Average rate of speed = total distance/total time
=
Hence, the average rate of speed in miles per hour is<em> 10.5 miles/hour.</em>
(b)
on Tuesday Carla decides to jog instead of walk and decreases her speed by 20%(20/100=0.2).
so her speed=10.5-0.2×10.5
=8.4 miles/hour.
Now distance travelled by her in 50 minutes(50/60 hours)=8.4×(50/60) miles
<em> =6.5 miles.</em>