Question

The total distance covered by a boy running at a speed of 72 km/hr for 29 seconds is

A. 20 m
B. (20)^2 m
C. (20)^3 m
D. (20)^4 m

Answer 1

$\huge{\underline{\underline{\bf{Solution}}}}$

$\rule{200}{2}$

$\begin{lgathered}\tt given\begin{cases} \sf{Time \: taken \: (t) = 20 \: seconds} \\ \sf{Speed = 72= \: kmh^{-1} = 20 ms^{-1}} \end{cases}\end{lgathered}$

$\rule{200}{2}$

$\Large{\underline{\underline{\bf{To \: Find :}}}}$

We have to find the Distance traveled.

$\rule{200}{2}$

$\Large{\underline{\underline{\bf{Explanation :}}}}$

We know the formula to find the value of distance.

$\Large{\star{\boxed{\rm{Distance = Speed \times time}}}}$

________________[Put Values]

$\tt{\mapsto Distance = 20 \times 20} \\ \\ \tt{\mapsto Distance = 200 \: m} \\ \\ \bf{Or} \\ \\ \tt{\mapsto Distance = (20)^2 \: m}$

$\rm{\therefore \: Option \: B \: is \: correct.}$