Question

आधुनिक प्रकाश और समतल ध्रुवीय प्रकाश में अंतर लिखिए

Answer 1

Answer:

David average speed driving for 5 hr was 55km /h during his first two hours of journey he drove at 60km/h and the last two hours he drove at 50 km/h what was his speed for the fifth hour of the journey

( step by step method)