Question

there are 21000 seats in a stadium, there are either 450 or 400 blocks of seats, there are three times as many 450 blocks as there 400, how many blocks of seats are there??​

Answer 1

Answer:

450 Seats =36 blocks

400 Seats = 12 blocks

Total Blocks = 48

Explanation:

Step by step explaination

(450*36)=16200 + (400*12)=4800

(I used 12 as it is 1/3 of 36)

16200+4800=21,000

36+12=48

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Answer 2

Let the x-blocks have 400 seats

Then 3х-blocks for 450 seats

400*x+450*3x=21000\\ 400x+1350x=21000\\ 1750x=21000\\ x=12400∗x+450∗3x=21000400x+1350x=210001750x=21000x=12

12 blocks   have 400 seats

36 blocks    have 450 seats

48- all blocks

Answer: 48