If the volumes of two right circular cones are in the ratio 1:4 and their diameters of bases in the ratio 4:5, then their heights will be in the ratio:
A series is given with one term missing. Select the correct alternative from the given ones that will complete the series. Millimetre, Micrometre, Nanometre, ?
In a certain code language, '-' represents 'x', '÷' represents '+', '+' represents '÷' and 'x' represents '-'. Find out the answer to the following question.