well normally it takes 44 seconds on an average for 1 of them to do it. So it would be: 44x4=176 seconds=3 minutes and 33 seconds (aprox)
To find the common multiples of two numbers, you first need to break them into their prime factors. In this case: 4 = 2x2 11 = 11 There are no common prime factors, and so we can say that the lowest common multiple is 11x4 = 44. In order to find other common multiples, we simply multiply this number by any integer, for instant 44x2, 44x3, 44x4, and so on. Following this rule, the first few common multiples of 4 and 11 are: 44, 88, 132, 176.
8÷2(2+2)=?8÷2×4=?4×4=168÷2(2+2)=16