Question

A distance of 14.4 km covered in 2 hours 40 minutes. Find the speed in m s⁻¹. With this speed, Sakshi goes to her school, 240 m away from her house and then returns back. How much time, in all, will Sakshi take?

Answer 1

QuestioN :

A distance of 14.4 km covered in 2 hours 40 minutes. Find the speed in m s⁻¹. With this speed, Sakshi goes to her school, 240 m away from her house and then returns back. How much time, in all, will Sakshi take?

GiveN :

• distance of 14.4 km covered in 2 hours 40 minutes.
• 240 m away from her house and then returns back.

To FiNd :

• Find the speed in m s⁻¹
• How much time, in all, will Sakshi take?

ANswer :

The answer is 50 min 20 sec.

SolutioN :

$\sf Distance =14.4km$

$\sf Time \:taken\: to \:cover \:=2\:hrs\:40\:mins$

      $\sf =2.\dfrac{2}{3}$

      $\sf =\dfrac{8}{3}hrs$

$\sf \implies Speed\:in\:m/s\:= \dfrac{14.4 \times 1000}{\dfrac{8}{3}\times3600\times10} =\dfrac{3}{2}ms^-^1$

$\sf \implies Distance \:from \:house \:to \:school \:and \:bank \:=( 240 + 240 ) m = 480 m$

$\sf \implies Time\: taken = \dfrac{480}{1.5}\:second =320\: seconds$

      $\sf = \left[\begin{array}{ccc}\dfrac{360}{60}\end{array}\right] min$

      $\sf =50\:min\:20\:sec.$

∴ Hence, the answer is 50 min 20 sec.

__________________________

Note: If you are not able to see the answer properly then kindly view the answer from website by the given link ↓↓↓

https://brainly.in/question/40288165

Answer 2

Answer:

$\sf Distance =14.4km$

$\sf Time \:taken\: to \:cover \:=2\:hrs\:40\:mins$

      $\sf =2.\dfrac{2}{3}$

      $\sf =\dfrac{8}{3}hrs$

$\sf \implies Speed\:in\:m/s\:= \dfrac{14.4 \times 1000}{\dfrac{8}{3}\times3600\times10} =\dfrac{3}{2}ms^-^1$

$\sf \implies Distance \:from \:house \:to \:school \:and \:bank \:=( 240 + 240 ) m = 480 m$

$\sf \implies Time\: taken = \dfrac{480}{1.5}\:second =320\: seconds$

      $\sf = \left[\begin{array}{ccc}\dfrac{360}{60}\end{array}\right] min$

      $\sf =50\:min\:20\:sec.$

∴ Hence, the answer is 50 min 20 sec.