Answer:
9,515balls
Step-by-step explanation:
Total surface area of the room = 2LW+2LH+2WH
L is the length
W is the width
H is the height
Given
L = 10, W = 12 and H = 24
Surface area = 2(10)(12)+2(10)(24)+2(12)(24)
Surface area = 240+480+576
Surface area of the room = 1296ft²
If each ball in the room is 2.5in
Converting to inches to foot
1ft = 12in
xft = 2.5in
Cross multiply
x = 2.5/12
x = 0.2083ft
Diameter of the tennis ball is 0.2083ft
Total surface area of the ball = 4πr² or πd²
Total surface area of the ball = 3.14(0.2083)² = 0.1362ft²
Number of ball in the room = Total surface area of the room/Total surface area of the ball
Number of ball in the room = 1296/0.1362
Number of ball in the room = 9515.4
Number of ball in the room ≈ 9,515 balls
