a man can swim with a speed of 4 km per hour in stillwater how long does it takes to cross a river in 1 km wide if the river flows steadily @ 3 km per hour and He makes his strokes normal to the river current how far down the river does he reach when he reaches the other bank (15 minute, 0.75 km)
Answers
==============ⓢⓦⓘⓖⓨ
==============ⓢⓦⓘⓖⓨ
Speed of the man,
vm = 4 km/h
Width of the river = 1 km
Time taken to cross the river
= Width of the river/ speed of the river
= 1/4 h
=15 min
Speed of the river, vr = 3 km/h
Distance covered with flow of the river
Distance covered with flow of the river = vr × t
= vr × t = 3× 1/4 = 3/4 km
= 3/4 × 1000 = 750 m
I hope, this will help you
=======================
·.¸¸.·♩♪♫ ⓢⓦⓘⓖⓨ ♫♪♩·.¸¸.·
___________♦♦⭐♦ ♦___________
Speed of the man who can swim is ,
vm = 4 km/h
Width of the river = 1 km
Time taken to cross the river
= Width of the river/ speed of the river
= 1/4 hour
=15 minute
Speed of the river, vr = 3 km per hour
Distance covered with flow of the river
Distance covered with flow of the river = vr × t
= vr × t
= 3× 1/4
= 3/4 km
= 3/4 × 1000
= 750 metre