Question

4. A train runs 42 Km. in 4 hours. How far will it go from 1 P.M. to 9.40 P.M.​

Answer 1

Answer:

101.5

distance covered in 1 hr = 42/4 = 10.5 km

distance covered in 40 mins = (10.5/60)×40

total time given = 9 hrs 40 mins

then total distance travelled in 9 hrs 40 mins is :

84km (for 8 hrs) + 10.5km (for 1 hr) + 7km (for 40 mins)

=101.5 km

Answer 2

Answer :-

• Firstly we will find the speed of the train from the help of given distance and time

$\sf{Speed = \dfrac{Distance}{Time}}$

$\sf{Speed = \dfrac{42}{4}}$

$\sf{Speed = \dfrac{21}{2}}$ km/hr

• Now that's the speed of the train and the another time has also given so we will find the distance with the help of time and speed.

• Speed = $\sf\dfrac{21}{2}$

• Time = 8 hr 40 min.

8 hr 40 min.

$\bf{(8+\dfrac{40}{60})}$

$\bf{(8+\dfrac{2}{3})}$

$\bf{\dfrac{24+2}{3}}$

$\bf{\dfrac{26}{3}hr}$

${}$

$\sf{Distance = Speed\times Time}$

$\sf{Distance = \dfrac{21}{2} \times (8+\dfrac{2}{3})}$

$\sf{Distance = \dfrac{21}{2} \times \dfrac{26}{3}}$

$\sf{Distance = 13\times 7}$

$\sf{Distance = 91 \:km}$

So, the train will cover 91 km within given time