a body covers half of its jaourney at speed of 30 km/her and other half at 50 km/hr. find average speed
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Explanation:
add 50km/h and 30km/h and divide them by 2 as the formula of average is the sum of digits by the number of digits.
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ans is 40km/hr
Explanation:
speed1=30
speed2=50
avg. speed=(30+50)/2=80/2=40km/hr
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