A rectangle has a height of 15 cm a width of 7 cm and the length is unknown. The total volume of the rectangular prism is 945 cm². What is the value of the length in centimeters

To find the length of the rectangular prism, you need to multiply the height, width, and length together to get the volume.

Volume = Height x Width x Length
945 cm² = 15 cm x 7 cm x Length

Now, we can solve for the length:
945 cm² = 105 cm x Length

Divide both sides by 105 cm to isolate the length:
Length = 945 cm² / 105 cm
Length = 9 cm

Therefore, the length of the rectangular prism is 9 cm.