Find the equation of line perpendicular to \( 5 x-3 y+4=0 \) that passes through the point \( (-4,1) \).

280- Calcola l'area di un triangolo sape do che la base misura 49 cm ed è i 7 dell'altezza. [857,5 cm

7. Three similar pieces of timber of length \( 240 \mathrm{~cm}, 320 \mathrm{~cm} \) and 380 cm are cut into equal pieces. Find the largest possible area of a square which can be made from any of the three pieces

6. Titik-titik \( V(k, 2 k), W(4 a, 2 b) \) dan \( X(8 a, 6 b) \) terletak pada suatu garis lurus. Titik \( W \) membahagi garis \( V X \) dengan nisbah \( 1: 4 \). Tunjukkan bahawa \( a=\frac{1}{6} b \). (TP4 Points \( V(k, 2 k), W(4 a, 2 b) \) and \( X(8 a, 6 b) \) lie on a straight line. Point \( W \) divides line \( V X \) with the ratio of \( 1: 4 \). Show that \( a=\frac{1}{6} b \).

Le diagonali di un rombo misurano 48 cm e 24 cm . Il rombo è equivalen1 quadrato. Calcola: (a) larea del rombo: (b) la lunghezza del lato del quadrato.

इब घनाभ का पृष्ठीय क्षेत्रफल 1300 सेमी \( ^{2} \) है। यदि इसकी चौड़ाई 10 होनी है तथा ऊँचाई 20 सेमी है तो इसकी लम्बाई ज्ञात कीजिए।