Question

ivan wants to plant grass in his backyard. his backyard is in the shape of a rectangle. its length is 30 feet and its width is 21 feet. suppose each pack of seed covers 15 square feet. how many packs of seed will he need to cover the backyard? packs

Explanation:

Step1: Calculate area of rectangle

The area formula for a rectangle is $A = l\times w$, where $l = 30$ feet and $w=21$ feet. So $A=30\times21 = 630$ square - feet.

Step2: Calculate number of seed - packs

If each pack covers 15 square feet, then the number of packs $n=\frac{A}{15}$. Substitute $A = 630$ into the formula, we get $n=\frac{630}{15}=42$.

Answer:

42