Answer fast! which lens can produce a virtual image and a real image? concave lens convex lens flat lens

Convex lens.

Explanation:

This lens forms real images (images that can be focused on a screen when the object is beyond a distance beyond F the focal length of the lens.

If the object distance is less than the focal length( In front of the focal point or between the focal point and the pole of the lens) , the lens forms a virtual enlarged image,

50 inches should be the resultant vector

when jerome paddle in flowing river towards east the net speed of jerome will increase

so the net speed of jerome will be given as

now the speed of paul will be same as it is given as he is running on the ground

so

so here we can say since the speed of jerome is more so he will win the race

now as we know the distance so the time difference is given as

so jerome will reach first and the time difference will be 203.55 s or 3.4 min