Question

how can we come to know where to use 3.14 and22/7 in mensuration​

Answer 1

Answer:

it will be mentioned in the question that use pi =3.14

unless we should use pi=22/7

Answer 2

Answer:

if the number that should be multiplied is divisible by 7, 22/7 is used. if the number is not divisible by seven, then 3.14 is used...

hope this helps!!