After it snows, it takes Maria and her little sister Anita 21 of an hour to shovel the snow off of the sidewalks on their street. This is 32 of the time it takes Maria to do the same job by herself.How long does it take Maria do this job by herself?hours
Q. After it snows, it takes Maria and her little sister Anita 21 of an hour to shovel the snow off of the sidewalks on their street. This is 32 of the time it takes Maria to do the same job by herself.How long does it take Maria do this job by herself?hours
Set Up Equation: Let's denote the time it takes Maria to shovel the snow by herself as T hours. According to the problem, Maria and her sister together take 21 hour to complete the task, and this time is 32 of the time Maria would take by herself. We can set up the following equation to represent this relationship:21 hour = 32×T
Isolate T: Now we need to solve for T. To do this, we can divide both sides of the equation by (32) to isolate T on one side:T=3221
Divide Fractions: To divide fractions, we multiply by the reciprocal of the divisor. The reciprocal of (32) is (23), so we multiply (21) by (23):T=(21)×(23)
Multiply Reciprocals: Multiplying the numerators and denominators separately, we get:T=2×21×3T=43
Final Answer: So, it takes Maria 43 of an hour to shovel the snow off of the sidewalks on their street by herself.