Ex 12.2, 4 (a) - Chapter 12 Class 6 Ratio and Proportion

Transcript

Ex 12.2, 4 Determine if the following ratios form a proportion. Also, write the middle terms & extreme terms where the ratios form a proportion. (a) 25 cm : 1 m and Rs 40 : Rs 160 1 m = 100 cm Now, 25 cm : 1 m = (25 𝑐𝑚)/(1 𝑚) = (25 𝑐𝑚)/(100 𝑐𝑚) = 25/100 = 1/4 = 1 : 4 Rs 40 : Rs 160 = (𝑅𝑠 40)/(𝑅𝑠 60) = 40/160 = 4/16 = 1/4 = 1 : 4 ∴ 25 cm : 1 m = Rs 40 : Rs 160 So, given ratios are in a proportion Here, Middle terms = 1 m, Rs 40 Extreme terms = 25 cm, Rs 160