Aspire Faculty ID #9845 · Topic: DU MCA 2020 · Just now
DU MCA 2020

The speed of a boat in still water is 12 km/hr and the rate of current is 3 km/hr. The distance travelled downstream in 30 minutes is

Solution

Speed in still water $= 12$ km/hr

Rate of current $= 3$ km/hr

Downstream speed $= 12 + 3 = 15$ km/hr

Time $= 30$ min $= \dfrac{1}{2}$ hr

Distance $= 15 \times \dfrac{1}{2} = 7.5$ km

Answer: $\boxed{7.5\text{ km}}$ ✅

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