Explanation:
1) reading of odometer at 8:50 am = 36472 km
reading of odometer at 11:50 am = 36598km
distance covered b/w 8:50 - 11:50 = 36598 - 36472 km = 126 km
total time taken to cover 126 km = 11:50 - 8:50 = 3hr
speed of the car = distance/time
= 126/3 = 42km/hr
2) Pavitra's car's speed = 720/8 = 90km/h
Riddhi's car's speed = 325/5 = 65km/h
therefore, Pavitra drives fast.
3) distance when Paheli drives at speed of 38km/hr for 7hr
= distance = speed × time
= distance= 38 × 7 = 266 km
distance when Paheli drives at speed of 70km/hr for (12 - 7 = 5) 5hr
= 70 × 5 = 350 km
total distance covered by her is (350 + 266) = 616km
4) Odometer reading at 8:30 = 57321 km
odometer reading at 8:50 = 57336
distance covered in 20 minutes (8:50 - 8:30) = 57336 - 57321 = 15 km
speed = distance/time
[tex] = \frac{15}{ \frac{20}{60} } \\ = \frac{15}{ \frac{1}{3} } \\ = \frac{15 \times 3}{1} \\ = 45[/tex]
45km/hr
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Verified answer
Explanation:
1) reading of odometer at 8:50 am = 36472 km
reading of odometer at 11:50 am = 36598km
distance covered b/w 8:50 - 11:50 = 36598 - 36472 km = 126 km
total time taken to cover 126 km = 11:50 - 8:50 = 3hr
speed of the car = distance/time
= 126/3 = 42km/hr
2) Pavitra's car's speed = 720/8 = 90km/h
Riddhi's car's speed = 325/5 = 65km/h
therefore, Pavitra drives fast.
3) distance when Paheli drives at speed of 38km/hr for 7hr
= distance = speed × time
= distance= 38 × 7 = 266 km
distance when Paheli drives at speed of 70km/hr for (12 - 7 = 5) 5hr
= 70 × 5 = 350 km
total distance covered by her is (350 + 266) = 616km
4) Odometer reading at 8:30 = 57321 km
odometer reading at 8:50 = 57336
distance covered in 20 minutes (8:50 - 8:30) = 57336 - 57321 = 15 km
speed = distance/time
[tex] = \frac{15}{ \frac{20}{60} } \\ = \frac{15}{ \frac{1}{3} } \\ = \frac{15 \times 3}{1} \\ = 45[/tex]
45km/hr