Question

what is the speed of the car​

Answer 1

Answer:

a. is the correct answer

Answer 2

solution

1 hr 40min 48 secs=6048 secs

now...

let the usual speed is =x km/h

now....

(5/7)th of usual speed is

$= \frac{45}{6048} km.s {}^{ - 1} = \frac{45 \times 3600}{6048} km.h {}^{ - 1} \\ therefore \: usal \:s peed \\ x = \frac{45 \times 3600}{6048} \times \frac{7}{5} km.h {}^{ - 1} \\ = > x = \frac{75}{2} km.h {}^{ - 1} = 37 \frac{1}{2} \: km.h {}^{ - 1}$