Concept explainers
Tofind:the total duration took by Joan alone to shovel the driveway.
Answer to Problem 7P
If chuck and Joan together work it will take
Explanation of Solution
Given:
Chuck can shovel the snow off his driveway in 40 min.
Joan and chuck both shovel the remaining snow in 10 min.
Concept used:
Rate of the work:
Ratio of work to the time interval with changes in time rate of work will change.
Calculation:
Chuck:
The amount of work done by each person using the formula:
Together it can complete the whole driveway.
Multiplying both sides by the L.C.D of
Subtracting
Hence,if chuck and Joan together work it will take
Chapter 7 Solutions
Algebra: Structure And Method, Book 1
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