7. The speed of a boat in still water is 15
km/hr and the rate of current is 3 km/hr. The distance travelled downstream in
12 minutes is
A. 1.2
km B.
1.8 km
C. 2.4
km D.
3.6 km
Answer:
Speed
Downstream = (15 + 3) km/hr
=
18 km/hr.
Distance
travelled =(18 x 12/60)hrs
=
3.6km.
