A car travels 90 km in 21 hrs
a) how much time is required to cover 30 km with the same speed?
b) find the distance covered in 2 hrs with the same speed?
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Answer:
a) 7hours. b) about 8.57 km
Step-by-step explanation:
a) 90km travels in 21 hours
1km travels in (21÷90) hours
30km travels in (21×30÷90) hours=7 hours
b) in 21 hours it travels 90km
in 1 hour it travels (90÷21)km
in 2 hours it travels{(90×2) ÷21}km= 8.57142857 km
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