Comparing Chapter 8 - NCERT

Comparing INTRODUCTIONIn our daily life, there are many occasions when we compare two we are Comparing heights of Heena and Amir. We find is two times taller than s height is 12 of Heena s another example, where 20 marbles are divided between Rita andAmit such that Rita has 12 marbles andAmit has 8 marbles. We say,1. Rita has 32 times the marbles that Amit has. has 23 part of what Rita another example is where we comparespeeds of a Cheetah and a speed of a Cheetah is 6 times the speedof a Man. OrThe speed of a Man is 16 of the speed ofthe you remember comparisons like this? In Class VI, we have learnt to make comparisonsby saying how many times one quantity is of the other. Here, we see that it can also beinverted and written as what part one quantity is of the 8 ComparingQuantities150 cm75 cmHeenaAmir15075 Speed of CheetahSpeed of Man120 km per hour20 km per hour2021 22 MATHEMATICS154154154154154In the given cases, we write the ratio of the heights as :Heena s height : Amir s height is 150 : 75 or 2 : you now write the ratios for the other comparisons?

Quantities 150 cm 75 cm Heena Amir 150 75 Speed of Cheetah Speed of Man 120 km per hour 20 km per hour ± ... Obviously , 4 : 1 > 2 : 1 (In fractional form, 4 1 2 1 >) Hence, we can say that the team performed better last year . In Class VI, we have also seen the importance of equivalent ratios. The ratios which

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