Answer:b
Step-by-step explanation:
Height=h
Base=b
area of =1440
area of =(b x h)/2
1440=(bxh)/2
1440x2=bxh
2880=bxh
b=5xh
Substitute b=5xh in 2880=bxh
2880=5xhxh
2880=5h^2
Divide both sides by 5
2880/5=5h^2/5
576=h^2
h^2=576
Take the square root of both sides
h=√(576)
h=24
