Free help with homework

Why join Brainly?

  • ask questions about your assignment
  • get answers with explanations
  • find similar questions


Volume of planks= 5x25x10=1250 cm²
volume of pit= 20x(6x100)x50=600000cm²
no. of planks= volume of pit/ volume of plank
=480 planks
1 5 1
No.of Planks = Vol. of pit/ Vol.of one plank.

Vol.of one plank= 5 m*25 cm*10 cm= 500 cm*25 cm*10 cm= 125000 cubic.cm.
Vol.of pit= 20 m*6 m*50 cm=2000 cm*600 cm*50 cm= 60000000 cubic.cm.

No.of Planks= 60000000/125000
= 480 planks.

Hope this help you. :)
0 0 0
The Brain
  • The Brain
  • Helper
Not sure about the answer?
Learn more with Brainly!
Having trouble with your homework?
Get free help!
  • 80% of questions are answered in under 10 minutes
  • Answers come with explanations, so that you can learn
  • Answer quality is ensured by our experts