Ex 7.2, 6 - Chapter 7 Class 7 Comparing Quantities
Last updated at Dec. 16, 2024 by Teachoo
Last updated at Dec. 16, 2024 by Teachoo
Ex 7.2, 6 Juhi sells a washing machine for Rs 13,500. She loses 20% in the bargain. What was the price at which she bought it? S.P = Rs 13,500 C.P = ? Loss Percentage = 20% Now, Loss = CP β SP CP = SP + Loss CP = 13,500 + Loss Loss percentage = πΏππ π /πΆπ Γ 100% 20 = π³πππ/(πππππ + π³πππ) Γ 100 20/100 = πΏππ π /(13500 + πΏππ π ) 2/10 = πΏππ π /(13500 +πΏππ π ) 1/5 = πΏππ π /(13500 +πΏππ π ) Cross Multiplying 1 Γ (13500 + Loss) = 5 Γ Loss 13500 + Loss = 5 Loss 5 Loss = 13500 + loss 5 Loss β loss = 13500 4 Loss = 13500 Loss = πππππ/π Loss = Rs 3375 From (1) C.P = 13500 + 3375 = Rs 16875 So, she bought it at Rs 16,875
Ex 7.2
Ex 7.2, 1 (b) Important
Ex 7.2, 1 (c)
Ex 7.2, 1 (d) Important
Ex 7.2, 2 (a)
Ex 7.2, 2 (b) Important
Ex 7.2, 2 (c) Important
Ex 7.2, 2 (d)
Ex 7.2, 3
Ex 7.2, 4 Important
Ex 7.2, 5
Ex 7.2, 6 Important You are here
Ex 7.2, 7 Important
Ex 7.2, 8
Ex 7.2, 9 (a) Important
Ex 7.2, 9 (b)
Ex 7.2, 10
Ex 7.2, 11 Important
About the Author
Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science and Computer Science at Teachoo