Datrys sqrt{(1300*10^6)/8*3986*10^14}6378137

$$\sqrt { \frac { ( 1300 \times 10 ^ { 6 } ) } { 8 \times 3986 \times 10 ^ { 14 } } } 6378137$$

Enrhifo

$$\frac{6378137\sqrt{25909}}{7972000}\approx 128.781025456$$

Camau Ateb

Canslo 4\times 10^{6} yn y rhifiadur a'r enwadur.

$$6378137\sqrt{\frac{325}{2\times 3986\times 10^{8}}}$$

Lluosi 2 a 3986 i gael 7972.

$$6378137\sqrt{\frac{325}{7972\times 10^{8}}}$$

Cyfrifo 10 i bŵer 8 a chael 100000000.

$$6378137\sqrt{\frac{325}{7972\times 100000000}}$$

Lluosi 7972 a 100000000 i gael 797200000000.

$$6378137\sqrt{\frac{325}{797200000000}}$$

Lleihau'r ffracsiwn \frac{325}{797200000000} i'r graddau lleiaf posib drwy dynnu a chanslo allan 25.

$$6378137\sqrt{\frac{13}{31888000000}}$$

Ailysgrifennu ail isradd y rhaniad \sqrt{\frac{13}{31888000000}} fel rhaniad ail israddau \frac{\sqrt{13}}{\sqrt{31888000000}}.

$$6378137\times \frac{\sqrt{13}}{\sqrt{31888000000}}$$

Ffactora 31888000000=4000^{2}\times 1993. Ailysgrifennu ail isradd y lluoswm \sqrt{4000^{2}\times 1993} fel lluoswm ail israddau \sqrt{4000^{2}}\sqrt{1993}. Cymryd isradd 4000^{2}.

$$6378137\times \frac{\sqrt{13}}{4000\sqrt{1993}}$$

Mae'n rhesymoli enwadur \frac{\sqrt{13}}{4000\sqrt{1993}} drwy luosi'r rhifiadur a'r enwadur â \sqrt{1993}.

$$6378137\times \frac{\sqrt{13}\sqrt{1993}}{4000\left(\sqrt{1993}\right)^{2}}$$

Sgwâr \sqrt{1993} yw 1993.

$$6378137\times \frac{\sqrt{13}\sqrt{1993}}{4000\times 1993}$$

I luosi \sqrt{13} a \sqrt{1993}, dylid lluosi'r rhifau dan yr ail isradd.

$$6378137\times \frac{\sqrt{25909}}{4000\times 1993}$$

Lluosi 4000 a 1993 i gael 7972000.

$$6378137\times \frac{\sqrt{25909}}{7972000}$$

Mynegwch 6378137\times \frac{\sqrt{25909}}{7972000} fel ffracsiwn unigol.

$$\frac{6378137\sqrt{25909}}{7972000}$$