Question

E Numerical Problems.
A vehicle travels 25 km in 15 minutes. Calculate its speed in km/h.
A commercial aircraft travels at 900 km/h. Calculate the distance it travels in 5 hours.
(earthquake waves) travel at about 8 km/s on the Earth's crust. Calculeren
distance it travels in 10 s.
1.
2.
3.
Seismic waves​

Answer 1

Answer:

1.a vehicle travels=25km

 time=15 mins=15/60

                       =1/4hr

 speed=distance/time

            =25km/1/4hr

            =25*4/1

            =100/1

            =100km/hr

   speed of a vehicle=100km/hr

2.a commercial aircraft travels=900km/hr

i.e,1 hour =900km [travelling]

     5 hours=x km

     (cross multiplication)

     1 hour*x km=5 hours*900km

     x km=5*900/1

    x km=4500/1=4500

    distance travelled by aircraft in 5 hrs=4500km