a river has width 0.5km and flows from west to east with a speed 30km/hr . if a boatman starts sailing his boat at a speed 40km/hr normal to bank , the boat shall cross the river in time :
(a) 0.6 min
(b) 0.75 min
(c) 0.45 min
(d) 3 min
Answers
Answered by
13
Minimum time =width of the river÷velocity of the boat=500mtr ×60 Minutes ÷40,000mtr=0.75
Aishwarya2003:
ur answer is correct but wat u do with the 30km/hr which is given in question? ??
is it given to confuse us
it is according to the formula, Time minimum=width÷velocity of boat. here velocity of river given for confusing
ok
tnq
Answered by
0
Explanation:
0.5 X 1.5 =0.75 min
ok
done
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