A student in the fifth grade, typically around 10-11 years old.

पांचवीं कक्षा का छात्र

English Usage: The fifth-grader eagerly participated in the science fair.

Hindi Usage: पांचवीं कक्षा के छात्र ने विज्ञान मेले में उत्साह पूर्वक भाग लिया।