Question

17. A car accelerates uniformly from 20 km/h to 50
km/h in 10 s. Calculate the distance covered by
the car in that time.
A. 97.22 m
B. 63.67 m
C. 79.03 m
D. None of these​

Answer 1

$a = \frac{(v - u)}{t}$

$v \: is \: final \: velocity \: and \: u \: is \: initial \: velocity$

$t = time$

$1km = 1000 \: m$

$a = \frac{(50000 - 20000)}{10}$

$a = \frac{30000}{10}$

$a = 3000ms$

$d = s \times t$

$distance \: covered \: by \: car \: in \: 10s = 3000 \times 10$

$= 30000m$

$so \: correct \: answer \: is \: option \: d) \: none \: of \: these$