Answer:
350
Step-by-step explanation:
If there are 210 girls, then the number of boys is (210÷3)x7=350.
it will take 4 hours( I'm not so sure)
$25x $15
------- = ------------- + 75
1h. 1h
25x = 100
x =100/25
x = 4
A) 7, 2
B) 1, 5
C) 6, 3
