Question

Chapter: 10
Worksheet-2
Class - 6: Mathematics
Ratlo and Proportion
I. Multiple Choice Questions (MCQs).
1. The sides of a triangle are in the ratio 1:2:3 and Its
perimeter is 42 cm. The length of the largest side is
(a) 7 cm (b) 14 cm (c) 21 cm (d) 28 cm
17
Aanvi

Answer 1

the length of largest side is 7cm

Answer 2

$\sf \Large Solution!!$

$\sf \to Let\:the\:sides\:be\:x,\:2x\:and\:3x.$

$\sf \to P=42\:cm$

$\sf \large So,$

$\sf \to x+2x+3x=42\:cm$

$\sf \to 6x=42\:cm$

$\sf \to x=7\:cm$

$\sf \large Now,$

$\sf \to x=7\:cm$

$\sf \to 2x=14\:cm$

$\sf \to 3x=21\:cm$

$\sf \boxed{Longest\:side=21\:cm}$

$\sf \boxed{option\:C}$

Thanks for asking!! :)