The motorcyclist covered the distance from town to another in 3 hours, moving at a speed of 54 km / h. How long will it take
| December 5, 2020 | education
The motorcyclist covered the distance from town to another in 3 hours, moving at a speed of 54 km / h. How long will it take for a mocyclist to return, but on a different road, if it is 22 km long, and its speed is 8 km / h less than the previous one?
Given: S1 = x km, S2 = x + 22 km, U1 = 54 km / h, U2 = 54 – 8 = 46 km / h, t1 = 3 h,
Find t2 -?
Solution: S1 = U1 * t1 = 54 * 3 = 162 km, so S2 = 162 + 22 = 184 km
Hence t2 = S2 / U2 = 184/46 = 4 h
Answer: 4 hours
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