a car travel with a speed of 30 km/h in the first 20 minutes and with the speed of 45 km/h in the next 20 minutes calculates the total distance covered by the car in these 40 minutes
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car has speed of 30km/hr in 20 min(1/3hr)
therefore distance in 1st 20 min = 30×(1/3)= 10km
car has speed of 45km/he in 20 min(1/3hr)
therefore distance in 2nd 20 min =
45×(1/3)= 15km
therefore total distance travelled in 40 min =
10 + 15 = 25 km
therefore distance in 1st 20 min = 30×(1/3)= 10km
car has speed of 45km/he in 20 min(1/3hr)
therefore distance in 2nd 20 min =
45×(1/3)= 15km
therefore total distance travelled in 40 min =
10 + 15 = 25 km
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