A rocket model consists of a right circular cylinder of radius 7 cm and height 30 cm…
MATHEMATICS · Subjective · GCSE · Mathematics · Geometry and Measures · Geometry and Measures
Problem
A rocket model consists of a right circular cylinder of radius 7 cm and height 30 cm with a hemispherical nose of the same radius fitted on its top. The curved surface of the cylinder is to be painted at Rs 100 per square metre, while the curved surface of the hemisphere is to be painted at Rs 120 per square metre. Find the total cost of painting the rocket. (Take π=22/7.)