Answer:
270 m^2
Step-by-step explanation:
1. Write down your formula. It is V= 1/3 Bh
2. Plug in your numbers. Your new formula is V= 1/3 (81)(10)
3. Simplify the expression to get 270.
If it's a mixed fraction, then:
Right-angled triangle. Let x be the required angle. Tan x = 8/6. x= 53.1°