Question

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Answer 1

hello dear...

==> see the above attachment.

be brainly.... ❤

Answer 2

R=2×78.4

H=39.2m

Relationship between H and R

H=R Tanx/4

Tanx=4H/R

Tanx=4×39.2/2×78.4

TanX=1

X=45°

Now

H=u^2sin^2x/2g

U=(2gh)squrt/2g

U=2×9.8×39.2/sin 45

U=39.2

Hope it helps you