Question

A boy travels with an average
speed of 20 m/s for 20
min.how much distance does
it travels?​

Answer 1

Provided that:

• Time = 20 minutes
• Average speed = 20 m/s

To calculate:

• Distance

Solution:

• Distance = 24000 m

Using concept:

• Average speed formula
• Formula to convert min into s

Using formula:

• Average speed is given by

• ${\small{\underline{\boxed{\sf{Average \: speed \: = \dfrac{Distance}{Time}}}}}}$

It can be also written as

• ${\small{\underline{\boxed{\sf{v \: = \dfrac{s}{t}}}}}}$

• Formula to convert minutes into seconds is given by

• ${\small{\underline{\boxed{\sf{1 \: minute \: = 60 \: seconds}}}}}$

Knowledge required:

• SI of distance is metre
• SI of average speed is m/s
• SI of time is second

Required solution:

~ Firstly let us convert min into s

$:\implies \sf 1 \: minute \: = 60 \: seconds \\ \\ :\implies \sf 20 \: minutes \: = 60 \times 20 \: seconds \\ \\ :\implies \sf 20 \: minutes \: = 1200 \: seconds \\ \\ {\pmb{\sf{Henceforth, \: converted!}}}$

~ Now let's find out the distance!

$:\implies \sf Average \: speed \: = \dfrac{Distance}{Time} \\ \\ :\implies \sf v \: = \dfrac{s}{t} \\ \\ :\implies \sf 20 = \dfrac{s}{1200} \\ \\ :\implies \sf 20 \times 1200 \: = s \\ \\ :\implies \sf 24000 \: = s \\ \\ :\implies \sf s \: = 24000 \: m \\ \\ :\implies \sf Distance \: = 24000 \: metres \\ \\ {\pmb{\sf{Henceforth, \: solved!}}}$