On Saturday, 8 children made a sandcastle in 5 hours. On Sunday, two more children joined the group. How long it will take the children to build a new sandcastle on Sunday?

Given that,

On Saturday, 8 children made a sandcastle in 5 hours.

We need to find the time taken to build a new sandcastle on Sunday if two more children joined the group.

8 children = 5 h

1 child = (5/8) h

When 2 children joined the group, total no of children now are 10.

It means,

10 children =

Hence, it will take 6.25 h when 2 more children joined the group.

9514 1404 393

  4 hours

Step-by-step explanation:

Assuming the work involved is still ...

  (8 children)(5 hours) = 40 children·hours

Then 10 children can do that amount of work in ...

  (40 children·hours)/(10 children) = 4 hours

1 1/4 hours

step-by-step explanation:

2/4 + 2/4 + 1/4 = 5/4 or 1 1/4

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data plot with   3 dots over 33, 1 dot over 34, 2 dots over 35, no dot over 36, 1 dot over 37, 2 dots over 38, 4 dots over 39, and 2 dot over 40.