Lakhmir Singh Class 8 Pdf 19: A Comprehensive Guide to Science for Class 8

Question 58:A boy walks from his classroom to the bookshop along a straight corridor towards North. He covers a distance of 20 m in 25 seconds to reach the bookshop. After buying a book, he travels the same distance in the same time to reach back in the classroom. Find (a) average speed, and (b) average velocity, of the boy.Solution :(a) Total distance covered in going to the bookshop and coming back to the classroom = 20 + 20 = 40mTotal time taken= 25 + 25 = 50 sec

Lakhmir Singh Class 8 Pdf 19

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