Question

the speed of an airplane is 885 per hour find the distance covered by the airplane in 3 hour and 20 minutes also express the distance in scientific notation​

Answer 1

Answer:

answer

1. 855*3

2. 855 /20 = 42.75

3. 42.75 + 2565 = 2604.75

Answer 2

$\sf\huge\bold{Answer:}$

Given :

• speed of an airplane = 885 km/h
• Time=3hrs20min

To find :

• Distance covered by plane

Solution :

$\fbox{Formula used :}$

$\tt\red{ :⟶distance = speed \times time}$

• Speed=885km/h
• Time=3hr+20min

[1min=1/60hr]

=3hr+(20/60)hr

=3hr+⅓hr

=3⅓hr

• Inserting values in formula :

$\tt\ :⟶d = \big(885 \times 3 \frac{1}{3} \big)km$

• Converting mixed fraction into improper fraction

$\tt\ :⟶d = 885 \times \frac{3 \times 3 + 1}{3} \: \: \: km$

$\tt\ :⟶d = \big(885 \times \frac{10}{3} \big)km$

$\tt\ :⟶d = \big( \frac{8850}{3} \big)km$

$\tt\ :⟶d = 2950km$

$\tt\red{ 1km = 1000m}$

$\tt\ :⟶d = 295×10^4m$

Distance covered by plane is 2950km or 295 ×10⁴m

• Converting distance in scientific notation

$\tt\ :⟶d = 2950 \times \frac{1000}{1000} \\ \:$

$\tt:⟶d=2.95 \times 10 {}^{3}$

$\tt\purple{d=2.95 \times 10 {}^{3} }$

Distance covered by plane is 2.95×10³ km