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1) it took grant 6 hours and 15 min to go 380 miles from Connecticut to central maine. what was his average speed.

A) 63.3 mph
B) 60.8 mph
C) 60.8 km/h
Dl 58.45 mph

2) A duck swims at a speed of 1 meter per second . How long does it take for it to cross a 50 meter wide pond

A) 50 seconds
B) 50 minutes
C) 50 hours
D) none of the a bove


3) A slug travels the length of a log in 2 hours. if the slug's average speed is 1.5 cm/ minute how long is the log ? .

A) 1 meter
B) 1.5 meters
C) 180 cm
D 200 cm

4) Sally rides her bike to the store to get some skittles. The store is 5 km away. If it takes her 10 minutes to get to the store what is her average speed

A) 0.5 km/hr
B) 0.5 mph
C) 0.5 km/ min
D) 5 km / min

Sagot :

Answer:

1.   60.8 mph

2.  50 sec.

3.  180 cm

4.  .5 km/min

Step-by-step explanation:

1.    d = rt      r = d/t

d = 380     t = 6-1/4 or 25/4

r = 380/(25/4) = 60.8 mph

2.  t = d/r      d = 50     r = 1

t  = 50/1 = 50 sec.

3.  d = rt     2 hr = 120 min

d = 1.5(120) = 180 cm

4.     r = d/t

r = 5/10 = .5 km/min