An object of height 20cm is placed on principle axis of a concex lens. Its 30cm tall image is formed on a screen placed at a distance of 10cm from the lens. Calculate the focal length of the lens.
yooo yooo honey sing yo yo mujna na bata ise kaise
yooo yooo honey sing yo yo mujna na bata ise kaise khana bus bhuk ki fikar n
yooo yooo honey sing yo yo mujna na bata ise kaise khana bus bhuk ki fikar n idar udhar ye mera amul chees hai
yooo yooo honey sing yo yo mujna na bata ise kaise khana bus bhuk ki fikar n idar udhar ye mera amul chees hai by amul company ros khao dimag ki
yooo yooo honey sing yo yo mujna na bata ise kaise khana bus bhuk ki fikar n idar udhar ye mera amul chees hai by amul company ros khao dimag ki shakti badhau fir tumko ye aayega ok my friend go and eat
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Explanation:
yooo yooo
yooo yooo
yooo yooo honey sing
yooo yooo honey sing yo yo mujna na bata ise kaise
yooo yooo honey sing yo yo mujna na bata ise kaise khana bus bhuk ki fikar n
yooo yooo honey sing yo yo mujna na bata ise kaise khana bus bhuk ki fikar n idar udhar ye mera amul chees hai
yooo yooo honey sing yo yo mujna na bata ise kaise khana bus bhuk ki fikar n idar udhar ye mera amul chees hai by amul company ros khao dimag ki