Answer:
H = 234.85m
Explanation:
Using the formula for calculating range to find the maximum height
Range R = U√2H/g
U is the speed = 13m/s
H is the max height
R is the distance covered in horizontal direction
g is the acceleration
Substitute the given values as shown;
90 = 13√2H/9.8
90/13 = √2H/9.8
6.923 = √2H/9.8
6.923² = 2H/9.8
2H = 6.923² * 9.8
2H = 469.70
H = 469.70/2
H = 234.85m
Hence the top level was 234.85m high