Answer:
150 cm
Step-by-step explanation:
The ratio of the entire door is 84:210 which is 2/5 so
60 is 2/5 of the length of the window
double 60 which is 120 which is 4/5
then half 60 which is 30
then add 120+30= 150 which is 5/5
150 cm
Another method is doing the bottom 60:84 which is 5/7
210/7= 30 so every 1/7 is 30
30*5= 150
150 cm
