L = 15m = 1500cm
b= 30cm
h= 4m= 400cm
So, total volume of the wall= l×b×h
= 1500×30×400= 1,80,00,000 cm^3
Now, volume of one brick= 22×12.5×7.5= 2062.5 cm^3
Volume of wall containing only bricks= total volume of the wall - volume of wall containing mortar
= 1,80,00,000 - (1,80,00,000 × 1/12)
= 1,65,00,000 cm^3
So, no. of bricks = volume of wall containing bricks ÷ volume of one brick
= 1,65,00,000 ÷ 2062.5
= 8000 bricks.
2/3 = 8/12
1/4 = 3/12
hence fraction of girls with neither blue or black eyes = 1 - 8/12 -3/12 = 1/12
Answer:
Step-by-step explanation:
Answer:
D
Step-by-step explanation:
0.000009 = 9×10^-6
0.00000003 = 3×10^-8
9×10^-6 / 3×10^-8 =
9/3 × 10^(-6+8) = 3 × 10^2
Answer:
i have no idea what it is so good luck
Step-by-step explanation:
