1. The marked price of a radio is Rs. 2055. If it is sold at 3% discount, find the selling price. Solution: Given, MP = Rs. 2055 Discount percentage = 3 \(\ ⇨ \frac{MP-SP}{MP}×100=3 \) \(…
Continue Reading1. A watch was bought for Rs. 250 and sold it for Rs. 260. Find the profit and profit per cent. Solution: Given, CP = Rs. 250 and SP = Rs. 260 We have, Profit = SP-CP = Rs. 260 - Rs. 250 = Rs. 1…
Continue ReadingIn our daily life, we buy so many things of our importance and we sell so many things also according to need and various circumstances. In such cases, the person who buys an article (product/thing) is called buyer or …
Continue ReadingLet us start with a daily life example where we compare different quantities, suppose the height of two students named Rahim and Karim, and we conclude Rahim is taller than Karim or Kaarim is shorter than Rahim or …
Continue ReadingWhenever we add a number to itself multiple times, we call it addition, but when it is multiplication, then it is called exponentiation and the product is called power of the number. So, a mathematical operation where two num…
Continue ReadingCambridge Math|Class 8|Exercise 7.3 1. Solve the following: (a) \(\ \frac{5x-7}{3x}=2 \) ⇒ \(\ 5x-7=2×3x\) ⇒ \(\ -7 = 6x-5x \) ⇒ \(\ x=-7 \) (b) \(\ \frac{5-7y}{2+4y}=\frac{-8}…
Continue ReadingCambridge Math|Class 8|Exercise 7.2 1. Solve the following: (a) \(\ 15y=10y-5 \) ⇒ \(\ 15y-10y=-5 \) ⇒ \(\ 5y=-5 \) ⇒ \(\ y = \frac{-5}{5}⇒y=-1 \) (b) \(\ 8-a=5a-3 \) ⇒ \(\ 8+3=5a+a \) ⇒ \(\ 11 = 6a…
Continue ReadingCambridge Math|Class 8|Exercise 7.1 1. Solve the following: (a) \(\ x+8=2 \) ⇒ \(\ x=2-8 \) ⇒ \(\ x=-6 \) (b) \(\ 2z-15=30 \) ⇒ \(\ 2z=30+15 \) ⇒ \(\ z=\frac{45}{2} \) ⇒ \(\ z=22.5 \) …
Continue ReadingExercise 2.2 | Mathematics | Class 8| SCERT Solution 1. Two numbers are in the ratio 5:7. The smaller number is 12 less than the larger number. Find the numbers. Solution: Let the smaller number be \(\ 5x \) an…
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