# Ex 8.3, 6 - Chapter 8 Class 7 Comparing Quantities

Last updated at Nov. 6, 2018 by Teachoo

Ex 8.3

Ex 8.3, 1 (a)

Ex 8.3, 1 (b) Important

Ex 8.3, 1 (c)

Ex 8.3, 1 (d) Important

Ex 8.3, 2 (a)

Ex 8.3, 2 (b) Important

Ex 8.3, 2 (c) Important

Ex 8.3, 2 (d)

Ex 8.3, 3

Ex 8.3, 4 Important

Ex 8.3, 5

Ex 8.3, 6 Important You are here

Ex 8.3, 7 Important

Ex 8.3, 8

Ex 8.3, 9 (a) Important

Ex 8.3, 9 (b)

Ex 8.3, 10

Ex 8.3, 11 Important

Last updated at Nov. 6, 2018 by Teachoo

Ex 8.3, 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 β¦(1) Loss percentage = πΏππ π /πΆπ Γ 100% 20% = πΏππ π /(13500 + πΏππ π ) Γ 100% (20%)/(100%) = πΏππ π /(13500 + πΏππ π ) 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 = 13500/4 Loss = Rs 3375 From (1) C.P = 13500 + 3375 = Rs 16875 So, she bought it at Rs 16,875