Question

b) In the past, Pintu and Amu could finish running a race in 29.8 seconds and
28/1/4 seconds, respectively. At present, they can finish the race in 25/1/5seconds and
31.5 seconds, respectively. Compare their present timing with their previous timing.
Who improved in their timing and by how much?​

Answer 1

Answer:

Let x=B

′

s time in seconds.

Let l represent the length of the track.

We have

40

l

(15)+

x

l

(15)=1

.∴x=24.