Question

please tell me fast and correct these two​

Answer 1

Answer:

1st ans

Given,

u=108km/h=

60×60

108×1000

=30m/s

a=−1m/s

2

v=0m/s

From 3rd equation of motion,

2as=v

2

−u

2

−2×1×s=0

2

−30×30

s=

−2×1

−30×30

s=450m

The correct option is B.