Question

A car travels 400 min 40 sec. What is the speed of the car?
a. 15 m/sec b. 10 m/sec
C. 12 m/sec
d. 14 m/sec​

Answer 1

$\sf \huge \bold {Ans - b.10m /sec}$

$\huge\mathfrak \pink {Explanation } :$

$\sf here ,\: distance = 400m \: and \: time \: = 40sec$

$\sf we \: have \: to \: find \: \green{speed} = ?$

$\sf we \: all \: know \: that \: ,$

$\sf \green s\green p\green e\green e\green d \green = \frac{\green d\green i\green s\green t\green a\green n\green c\green e}{ \green{time}}$

$\sf \therefore speed \: = \frac{400}{40}$

$\sf speed = \frac{10}{1} = 10$

$\sf \huge {speed = \frac{10mint}{sec} }$

Answer 2

Given:-

A car travels 400 min/40 sec

To Find:-

The speed of the car?

Using the formula:-

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

Solution:-

Time = 400 mins

$\sf{Speed=}\dfrac{400}{10}$

$\implies\sf{Speed=}\dfrac{400}{100}$

$\implies\sf{Speed=}\dfrac{ \cancel{400} { \: \: }^{10} }{ \cancel{100} { \: \: }^{1} }$

$\implies\sf{Speed = \boxed{ \sf10}}$

Additional Information:-

• Time = Distance/Speed
• Speed = Distance/Time
• Distance = Speed × Time