Answer:
V=1/3Bh
B=1/2bh
b=8
h1=7
h2=?
V=1/3(1/2bh1)h2
56 = 1/3(1/2 x 8 x 7)h2
56 = 1/3(28)h2
56 = 9.33h2
56/9.33 = 9.33h2/9.33
6=h2
Check:
V=1/3(1/2bh1)h2
56 = 1/3 (1/2 x 8 x 7) 6
56 = 1/3 (28) 6
56 = (1/3 x 28 x 6)
56 = 56
So, the height of the pyramid is 6.
Hope this helped! Have a great rest of your day! :)