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Hi there! Have questions about your homework? At Brainly, there are 60 million students who want to help each other learn. Questions are usually answered in less than 10 minutes. Try it for yourself by posting a question! :D

Let the number be 1x, 3x and 5x By the condition, (1x) x (3x) x (5x) = 960 or, 15 x3 = 960 or, x3 = 960/15 or, x3 = 64 or,x3 = 4x4x4 or, x= 4 So, the numbers are, 4, 12 and 20 Their sum is = 4+12+20 = 36

Let the three numbers be a,b,c a:b:c=1:3:5,abc=960 Let a=x,b=3x,c=5x x*3x*5x=960 15x^3=960 x^3=960/15 x^3=64 x=(64)^1/3 x=4 therefore,a=x=4 b=3x=12 c=5x=20 hence,a+b+c=4+12+20=36 therefore,their sum is 36......