10 boys clear a piece of land in 21 days. How many days will it take 7 boys to clear the same land at the same rate Pls i need answer fast

Given:

10 boys clear a piece of land in 21 days.

To find:

The number of days it will take 7 boys to clear the same land at the same rate.

Solution:

We have,

10 boys clear a piece of land in 21 days.

Total work =

                 =

Let 7 boys clear the same piece of land in x days.

Total work =

                 =

Now, the total work is same.

Divide both sides by 7.

Therefore, 7 boys clear the same piece of land in 30 days.

7. 153.86 ft

8. 12.56 ft

9. 78.5 m

10. 379.94 in

11. 132.665 m

12. 12.56 yd

13. 226.865 ft

14. 113.04 ft

15. 63.585 ft

16. 254.34 m

17. 50.24 cm

step-by-step explanation:

7.

8.

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13.

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17.

y-1700=200(x+4)

step-by-step explanation:

200(x+4) is 200x + 800 she is saving 200 per week x is the weeks and the -1700 is. us that’s howmuch she already had