Question

ARITHMETIC
63
57. Speeds of two boats A and B in still water are
A 10 km/hour and 12 km/hour respectively. At
10 a.m. A starts along the current and B starts
against the current from the places C and D
respectively. If the distance between C and D
be 121 km, when will A and B meet?​

Answer 1

Answer:

Let the speed of stream =ykm/h

since boat A is moving downstream with 12km/h

speed of blast a

(12+y)km/h

since boost is moving upstream with 15 km/km/h

speed of boat B

=(15-y)km/h both the blasts aate moving opposite direction

relative asked of A and A

=12+y+15+-y

=27km/h