(i) \(\frac{2}{3}\) × 2 \(\frac{2}{3}\) = \(\frac{2}{3}\) × \(\frac{8}{3}\) = \(\frac{16}{9}\) = \(\frac{17}{9}\)
(ii) \(\frac{2}{7}\) × \(\frac{7}{9}\) = \(\frac{2}{9}\)
(iii) \(\frac{3}{8}\) × \(\frac{6}{4}\) = \(\frac{9}{16}\)
(iv) \(\frac{9}{5}\) × \(\frac{3}{5}\) = \(\frac{27}{5}\)= 1 \(\frac{2}{25}\)
(v) \(\frac{1}{3}\) × \(\frac{15}{8}\) = \(\frac{5}{8}\)
(vi) \(\frac{11}{2}\) × \(\frac{3}{10}\)= \(\frac{33}{20}\) = 1 \(\frac{13}{20}\)
(vii) \(\frac{4}{5}\)× \(\frac{12}{7}\) = \(\frac{48}{35}\) = 1 \(\frac{13}{35}\)
Match the items given in Column I with one or more items of Column II.
Column I | Column II |
(a) A plane mirror | (i) Used as a magnifying glass. |
(b) A convex mirror | (ii) Can form image of objects spread over a large area. |
(c) A convex lens | (iii) Used by dentists to see enlarged image of teeth. |
(d) A concave mirror | (iv) The image is always inverted and magnified. |
(e) A concave lens | (v) The image is erect and of the same size as the object. |
- | (vi) The image is erect and smaller in size than the object. |