Aconical tent is made of canvas that has a base that is 34 feet across and a slant height of 12 feet to the nearest whole unit what is the area of the canvas including the floor

The lateral area is π r ℓ units² 

The base is 20 feet across so the radius is 10 feet 

Multiply 3.14 × 10 × 14 

3.14 × 10 = 31.4 

31.4 × 14 = 31.4 × 10 + 31.4 × 4 
= 314 + 120 + 4 + 1.6 
= 434 + 5.6 
= 439.6

Ithink not so sure but i tried it out and came out to be b