Question

u cycled 30 km in 1 h 17 min how long does it take to cycle 8 km with the same speed
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Answer 1

Answer:

20.5min or 1232.67s

Step-by-step explanation:

distance=S=30km=30×1000m= 30,000m (1km=1000m)

time= t = 1hr 17min = 60 min +17 min = 77min (1hr=60min)

77min= 77×60s= 4620s (1min=60seconds)

speed=v =?

First we find speed v

Using formula

t = S ÷ v

putting values

4620s = 30,000÷ v

v= 30,000m÷4620s

v=6.49m/s

Now,

S=8km

S=8×1000m (1km=1000m)

S=8000m

speed(v) is same

t=?

t= S÷v

putting values

t=8000m÷6.49m/s

t=1232.67s

To convert it in minutes

t=1232.67÷60min

t= 20.5min