Datrys 7*150*3.5+7*69*(7+12+3.5)*2+7*200*(7+12+7+100)*2/7*150+7*69*2+7*200*2

$$\frac { 7 \times 150 \times 3.5 + 7 \times 69 \times ( 7 + 12 + 3.5 ) \times 2 + 7 \times 200 \times ( 7 + 12 + 7 + 100 ) \times 2 } { 7 \times 150 + 7 \times 69 \times 2 + 7 \times 200 \times 2 }$$

Enrhifo

$$\frac{27015}{344}\approx 78.531976744$$

Camau Ateb

Lluosi 7 a 150 i gael 1050. Lluosi 7 a 69 i gael 483. Lluosi 7 a 200 i gael 1400.

$$\frac{1050\times 3.5+483\left(7+12+3.5\right)\times 2+1400\left(7+12+7+100\right)\times 2}{7\times 150+7\times 69\times 2+7\times 200\times 2}$$

Lluosi 1050 a 3.5 i gael 3675.

$$\frac{3675+483\left(7+12+3.5\right)\times 2+1400\left(7+12+7+100\right)\times 2}{7\times 150+7\times 69\times 2+7\times 200\times 2}$$

Adio 7 a 12 i gael 19.

$$\frac{3675+483\left(19+3.5\right)\times 2+1400\left(7+12+7+100\right)\times 2}{7\times 150+7\times 69\times 2+7\times 200\times 2}$$

Adio 19 a 3.5 i gael 22.5.

$$\frac{3675+483\times 22.5\times 2+1400\left(7+12+7+100\right)\times 2}{7\times 150+7\times 69\times 2+7\times 200\times 2}$$

Lluosi 483 a 22.5 i gael 10867.5.

$$\frac{3675+10867.5\times 2+1400\left(7+12+7+100\right)\times 2}{7\times 150+7\times 69\times 2+7\times 200\times 2}$$

Lluosi 10867.5 a 2 i gael 21735.

$$\frac{3675+21735+1400\left(7+12+7+100\right)\times 2}{7\times 150+7\times 69\times 2+7\times 200\times 2}$$

Adio 3675 a 21735 i gael 25410.

$$\frac{25410+1400\left(7+12+7+100\right)\times 2}{7\times 150+7\times 69\times 2+7\times 200\times 2}$$

Adio 7 a 12 i gael 19.

$$\frac{25410+1400\left(19+7+100\right)\times 2}{7\times 150+7\times 69\times 2+7\times 200\times 2}$$

Adio 19 a 7 i gael 26.

$$\frac{25410+1400\left(26+100\right)\times 2}{7\times 150+7\times 69\times 2+7\times 200\times 2}$$

Adio 26 a 100 i gael 126.

$$\frac{25410+1400\times 126\times 2}{7\times 150+7\times 69\times 2+7\times 200\times 2}$$

Lluosi 1400 a 126 i gael 176400.

$$\frac{25410+176400\times 2}{7\times 150+7\times 69\times 2+7\times 200\times 2}$$

Lluosi 176400 a 2 i gael 352800.

$$\frac{25410+352800}{7\times 150+7\times 69\times 2+7\times 200\times 2}$$

Adio 25410 a 352800 i gael 378210.

$$\frac{378210}{7\times 150+7\times 69\times 2+7\times 200\times 2}$$

Lluosi 7 a 150 i gael 1050. Lluosi 7 a 69 i gael 483. Lluosi 7 a 200 i gael 1400.

$$\frac{378210}{1050+483\times 2+1400\times 2}$$

Lluosi 483 a 2 i gael 966.

$$\frac{378210}{1050+966+1400\times 2}$$

Adio 1050 a 966 i gael 2016.

$$\frac{378210}{2016+1400\times 2}$$

Lluosi 1400 a 2 i gael 2800.

$$\frac{378210}{2016+2800}$$

Adio 2016 a 2800 i gael 4816.

$$\frac{378210}{4816}$$

Lleihau'r ffracsiwn \frac{378210}{4816} i'r graddau lleiaf posib drwy dynnu a chanslo allan 14.

$$\frac{27015}{344}$$

Ffactor

$$\frac{3 \cdot 5 \cdot 1801}{43 \cdot 2 ^ {3}} = 78\frac{183}{344} = 78.53197674418605$$