A Bullet of a mass

Question

10

g
is shot into a water melon of a mass
0.2

k
g
which is resting on a platform. At the time of impact, the bullet is travelling horizontally at
20

m
/
s
.

Answer 1

S
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a
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y
i
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g

v
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r
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c
a
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t
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x
t

i
s
?

Answer 2

Also unable to type the subject in the SCHOOL SUBJECT box.
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Answer 3

bullet mass = 10 * 10^-3 = .01 kg
.01 * 20 = 0.21 * v