Question

A boy travels with an average speed of $$10 \ m s^{-1}$$ for $$20 $$ min. How much distance does he travel?

Answer 1

Average speed of boy = $$10 \ m s^{-1}$$
Time taken = $$20 \ min$$

Using, Distance travelled = Speed $$\times $$ Time taken

Convert minutes into seconds
$$1$$ minute = $$60$$ sec.
$$20$$ minutes = $$20 \times 60 = 1200 \ sec$$.

Distance travelled $$= 10 \ m s^{-1} \times 1200 \ sec$$
.$$= 12000\ m$$ or $$12 \ km$$