Question

A car moves with a speed of 60 km hâ1 for 20 min and then at a speed of 30 km hâ1 for the next 20 min. The total distance covered by the car is
(1) 10 km
(2) 20 km
(3) 30 km
(4) 40 km

Answer 1

hay..............
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20 minutes = 20/60 hour
= 1/3 hour
we know that ...
distance = speed × time
first distance = 60×{1/2 }=30 km
second distance = 30×1/2=15
now. total distance = 30+15 =45 km
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