36 ft = 12 yards
24 ft = 8 yards
9 in = 0.25 yards
12 * 8 * 0.25 * 55 = ?
V=πr^2h
500 = 3.14 * r^2 * 10
Solve for r
1. Suppose you want to buy concrete for a 36ft by 24 ft by 9 in. patio. If concrete costs $55/yd^3, how much will the concrete for the patio cost?
2. A cylinder has a volume of about 500 cm^3 and a height of 10 cm. What is the lenght of the radius to the nearest tenth of a cm?
2 answers
500=3.14*R^2*10
500=31.4*R^2
R^2=500/31.4
R^2=15.92
R= √15.92
R=3.99 or 4 cm
500=31.4*R^2
R^2=500/31.4
R^2=15.92
R= √15.92
R=3.99 or 4 cm
1 answer