Question

car on a straight road at a speed 80 km per hour what distance cover in 90 minutes how long will it take to 40 kilometres at this speed​

Answer 1

Explanation:

given,

v=80 km/hr

to find ,

1. distance(s) in 90 min=90/60 hr=1.5hr
2. time(t) to travel 40km distance

sol.

1. v=s/t

80=s/1.5

s=80×1.5

s=120km

2. v=s/t

80=40km/t

t=40/80

t=1/2hr

t=0.5 hr