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Ex 7.2, 6 - Chapter 7 Class 7 Comparing Quantities
Last updated at Dec. 16, 2024 by Teachoo
Cost price, selling price, profit % , loss%
Chapter 7 Class 7 Comparing Quantities
Concept wise
Transcript
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
