Question

A boy travels with a speed of \(10 ~𝑚𝑠^{ −1}\) for 30 minutes. How much distance does he travel?

Answer 1

Given, Speed, \(𝑣 = 10 ~𝑚𝑠^{ −1}\)
Time taken, \(𝑡 = 30 ~𝑚𝑖𝑛 = 30 \times 60 ~𝑠 = 1800 ~𝑠\)
Using formula of speed,
\(\text{Speed} = \dfrac{\text{Distance travelled (d)}}{\text{ Time taken}}\)
So, distance travelled by boy,
\( \text{Distance travelled} = \text{speed}(𝑣) \times \text{time taken}(𝑡)\)
\(= 10 ~𝑚𝑠^{ −1}\times 1800 ~𝑠\)
\(\text{Distance travelled} = 18000 ~𝑚 = 18 ~𝑘𝑚\)
[ Since \(1 ~𝑘𝑚 = 1000 ~𝑚\) ]