A cone-shaped wheat pile has a circumference of 18.84m at the bottom and a height of 2.1m. It is known that each cubic meter of wheat weighs 0.75T. How many tons does this pile of wheat weigh? How can I make it with four decimal places=

A cone-shaped wheat pile has a circumference of 18.84m at the bottom and a height of 2.1m. It is known that each cubic meter of wheat weighs 0.75T. How many tons does this pile of wheat weigh? How can I make it with four decimal places=

.0.75×〔3.14×（18.84÷3.14÷2）²×2.1×1/3〕
= 0.75×〔3.14×9×2.1×1/3〕
= 0.75×19.782
= 14.8365
About 15 (tons)
A: this pile of wheat weighs about 15 tons

A cone-shaped wheat pile is 1 meter high and 18.84 meters long. If the weight of wheat is 0.75 tons per cubic meter, how many tons is there in this pile?

R = C ／ 2 π, = 18.84 ／ (2 × 3.14), = 3 (m); V-cone = 13 π r2h, = 13 × 3.14 × 32 × 1, = 13 × 3.14 × 9 × 1, = 9.42 (M3); 9.42 × 0.75 = 7.065 (T); a: there are about 7.065 tons of wheat in this pile

There is a pile of wheat into a cone, the perimeter of the bottom is 18.84m, the height is 4m, 700kg per cubic meter. How many tons of this pile of wheat are there!

r=18.84/2*3.14=3m
s=3.14*r^2=3.14*9=28.26m^2
V=1/3Sh=1/3*28.26*4=37.68m^3
M = PV = 700kg / m ^ 3 * 37.68m ^ 3 = 26376kg = 26.376t