Can you solve this 150 years old puzzle? #shorts

A four year old child

Can You Solve This? 6div2(1+2)=

The pumping capacity of heart in 70 years old person as compared to 30 years old person is

Change the statements, converting expressions into statements in ordinary language Manisha is z years old. Her uncle is 5z years old and her aunt is (5z-4) years old.