Problema Solution
john can eat a pizza in 4 minutes .Jim can eat a pizza in 5 minutes .their grandfather can eat a pizza in 20 minutes .if two boys and their grandfather all start eating the same pizza at same time , how many seconds close it takes them to finish the pizza?
Answer provided by our tutors
JOHN'S SHARE:1/4
JIM'S SHARE:1/5
GRANDPA'S SHARE:1/20
TOTAL SHARE:1/4+1/5+1/20=(5+4+1)/20=10/20=1/2
HENCE THEY CAN COMPLETE IN 1 DIVIDED BY 1/2= 2 MINUTES