Question

A deer is running at a constant speed.it watches a lion and increase its speed by 3mtr /sec per each second.if after watching the lion it travels 400mt in 10 sec,500 velocity before it watches the lion?

Answer 1

Answer:

37m/s

Explanation:

Let speed before watching the lion be:x

After watching the lion, speed is 400m/10s

So speed after watching lion in seconds= 400÷10=40

At seeing the lion, it increases its speed by 3 secs, so previous speed was

=40-3=37

v=37m/s

Answer 2

Answer:

10m/s

Explanation:

Speed=distance/time

=400/10

=40m/s

:.speed after watching lion =40m/s

It increases speed 3m/s per each second.

:.Total speed increased=3×10=30m/s

Speed before watching lion =40-30=10m/s