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7. Difference between a number and its three-fifth is 40 . Identify the number.a) 80b) 100c) 90d) 120 |
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Answer» currect answer is 100 let, the number be 'x' therefore, x - 3x/5 = 40 2x/5 = 40 x = 40×5/2 = 100 therefore, value of x is 100. so option (b) is correct. Correct answer is (b) Let the number be x. then, it's three-fifth is 3x/5 . Now, x-3x/5= 40 (difference given in question) 5x-3x/5 =40 = 2x/5=40 2x= 200 so, x= 100✓ |
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