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Olympiad-Math
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Class 9
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Everyday Mathematics
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Q)
A car covers 4 successive 3km stretches at speed of 10kmph, 20kmph, 30kmph & 60kmph resp. Its average speed is
( A ) 25 km/h
( B ) 20 km/h
( C ) 30 km/h
( D ) 35 km/h
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