Question

A 15-step staircase is made out of concrete. Three of the steps are shown. What is the volume of the 15-step staircase?

Answer 1

Need help?

Answer 2

yes @just_one_last_goodbye

Answer 3

@just_one_last_goodbye help please

Answer 4

do you know the formula for the volume of a triangular prism?

Answer 5

@caitlyn10

Answer 6

no i don't

Answer 7

v=bh?

Answer 8

volume=1/2*length*width*height

Answer 9

so try and find the volume of the first step @caitlyn10

Answer 10

40,500?

Answer 11

@atreyu6s3x6

Answer 12

nice try, V=1/2(90*15*30)
you forget one step

Answer 13

multiply by 1/2, or simply divide by 2

Answer 14

20,250

Answer 15

then times by 14

Answer 16

Yes! :) so now we need the volume of the stair case so we multiply by 15

Answer 17

multipy 20,250 by 15

Answer 18

okay got it!

Answer 19

alright