A man 2 metres high walks at a uniform speed of 5 km/hr away from a lamp - post 6 metres high. Find the rate at which the length of his shadow increases.

Matching exercise

Match the items on the right to the items on the left.

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Given: man 2 metres high walks at a uniform speed of 5 km/hr away from a lamp - post 6 metres high ; To find the rate at which the length of his shadow increases

Let AB be the lamp post and let MN be the man of height 2m ; Let AL = l meter and MS be the shadow of the man