Question

the speed of an airplane is 1240 km per hour.find the distance covered by the airplane in 3 hours and 20 minutes. also, express the distance in scientific notation

Answer 1

the above question uses the formula of :-
distance = speed X time

all the units in the above formula must be in their same units.
so the given values are

speed = 1240 km/hr

Time = 3 hrs 20 minutes =3*1/3 = 10/3 hrs

so now the units are ready for operations.
applying the distance, time and speed formula
we get :-

Distance =
$1240 \times \frac{10}{3} km \\ \\ = 413.3333 \times 10 \\ \\ = 413.33 \times 10 \\ \\ = 4.1333 \times {10}^{3}$
here the answer in the scientific notation.
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Answer 2

Answer:

speed of airplane=1240km/h

Time given =3 hours 20 minutes

we can written 3 hours and 20 minutes as 10\3 ,

1240×10/3

4.133.33km

In scientific notation the result=4.13333×10 to the power 3