4 cubic squares is the answer
Answer:
d-7,8,9,10,11,12
r-70,80,90,100,110,120
Step-by-step explanation:
Answer:
40
Step-by-step explanation:
5 people in the room have 5*40 = 200 years altogether
a new person is X years old.
Now 6 people have (200 + x) years altogether.
Mean age of 6 people is (200+x)/6. and it is also = 40.
So,
(200+x)/6 = 40
200 + x = 240
x = 40
