Answer:
June 6th
Given:
Start date - April 18th
Find - date after 7 weeks
7 weeks in days (7 days in a week) = 49 days
April: 30 days - 18th = 12 days of April
May: 31 days
June: 30 days
12 days in April + ___ days in May + ___ days in June
12 days in April + 31 days in May + x days in June = 49 days
43 days + x days = 49 days
x = 6 days
The cricket classes will end on June 6th