A boatman can take the same time to row 6.5 km downstream and 3.5 km upstream. His speed in still water 2.5 km/hr. The speed of the stream is.

(A) 0.56 Km/h
(B) 0.60 Km/h
(C) 0.75 Km/h
(D) 0.90 Km/h

A pedal boat goes 12 km upstream and 14 km downstream in 3 hours. It goes 15 km upstream and 10.5 km downstream in 3 hours 15 minutes. The speed of the boat in still water is?

(A) 8 Km/h
(B) 9 Km/h
(C) 10 Km/h
(D) 15 Km/h

If a boy rows 8 km downstream in 6 hours and 4 km upstream in 4 hours then how long will he take to cover 16 km in stationary (still) water?

(A) 08 Hours
(B) 14 Hours
(C) 16 Hours
(D) 22 Hours

Diminishing MRS means:

(A) Consumer wants to give up lesser units of Y in exchange for good X
(B) Consumer wants to give up more units of Y in exchange for good X
(C) Consumer wants to give up same units of Y in exchange for good X
(D) None of the above

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