A circular garden has a circumference of 63 yards. Lars is digging a straight line along a diameter of the garden at a rate of 5 yards per hour. How many hours will it take him to dig across the garden? Use 3.14 for π and round the diameter to the nearest whole number, if necessary.

4 hours

Step-by-step explanation:

If the circumference of the circular garden = 63 yards

Circumference of a Circle = 2πr=πd (d=diameter)

Therefore:

πd = 63

diameter of the circular garden = 63/3.14=20 yards

If he digs at a rate of 5 yards per hour, the time required to dig across the garden will be:

20 yards/5 yard per hours = 4 hours

It will take him 4 hours to dig across the circular garden.