I need help with 3 maths sums. Here they are, plz give the answer with procedure
First Question
Ten open cylindrical containers are to be painted on the outside, including the base. Each container has a radius of 30cm and a height of 28cm. Given that 150g of paint is needed to paint an area of 1m square, find the amont of paint required to paint the ten cylinders. Give your answer in kg.
Second Question
A cylindrical barrel 70 cm in diameter and 80 cm in height is filled with water. A leak at the bottom drains away 0.2 litres of water every minute. HOw long will it take for the water level to drop by 6cm?
Third Question
The Singapore Expo has an exhibition area of 60000m square, making it the largest exhibition centre in the region. If the average height of the exhibition centre is 4.85m, find the volume of air in it. If the density of the air is approx. 1.26kg/m cube, find the mass of air contained in the exhibition centre.
PLz ans the sums with procedure. Thnx
2006-07-17
20:42:49
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3 answers
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asked by
Faizan
1