Ex 7.6, 9 - Jaidev takes 2 2 1/5 minutes to walk across school ground

Ex 7.6, 9 - Chapter 7 Class 6 Fractions - Part 2
Ex 7.6, 9 - Chapter 7 Class 6 Fractions - Part 3 Ex 7.6, 9 - Chapter 7 Class 6 Fractions - Part 4

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Ex 7.6 ,9 Jaidev takes 2 1/5 minutes to walk across the school ground. Rahul takes (7 )/4 minutes to do the same. Who takes less time and by what fraction? Jaidev Time take by Jaidev to walk = 2 1/5 minutes = (2 × 5 + 1)/5 = (10 + 1)/5 = 11/5 Rahul Time take by Rahul = 7/4 minutes We need to find who take less time So, we need to find lesser of 11/5 & 7/4 Since their denominator are different, we need denominator same Common denominator = LCM of 5 & 4 = 2 × 2 × 5 = 20 Thus, 11/5 7/4 So, 35/20 < 44/20 7/4 < 11/5 So, Rahul takes less time We also need to find Fraction by which time is less Now, Fraction by which time is less = 11/5 − 7/4 = 44/20 − 35/20 = (44 − 35)/20 = 𝟗/𝟐𝟎 ∴ Rahul takes less time, by 𝟗/𝟐𝟎 minutes

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Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.