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A car travels 100km at a …

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A car travels 100km at a speed of 60km/h and returns with a speed of 40 km/h.Calculate the average speed for the whole journey

Posted by Sanvitti Kalkonde 3 months ago

CBSE > Class 09 > Science

1 answers

Ishneet Kour 3 months ago

(GIVEN) Distance = 100 km Speed while traveling= 60km /h (1) Speed while returning= 40km/h(2) To find time T= D/S Case 1 : 100/60 5/3 hrs Case 2:100/40 5/2hrz *Average speed* = total distance / total time = 100+100/5/3+5/2 200/(l.c.m) 10/6+15/6 200/25/6 200×6/25 8×6 ===✓48 km/h is your answer

1Thank You

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