10 x 30=300 because you 3 tens is 30 times 10 is 300. hope it helped.
Answer:
30
Step-by-step explanation:
Sum of ages= 40
Let the sons age be x
Fathers age = 3 times x or ,3x
So 3x+x=40
4x= 40
x= 40/4
= 10
Therefore the fathers age = 3x
= 3*10
= 30
Answer:
D, not B
Step-by-step explanation:
So using Pythagorean Theorem:

Yep, It's not B, But D.
Hope this helps!
Stay Safe!
Answer:
the 1st one
Step-by-step explanation: