One tin of paint can cover an area of

MATHEMATICS · Subjective · CBSE · Mathematics · Surface Areas and Volumes · Surface Areas and Volumes

Problem

2.2\,\text{m}^2

. What is the greatest possible radius of a right circular cone whose slant height is

70\,\text{cm}

if exactly one tin is used to paint only its curved surface? (Give your answer correct to one decimal place.)