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Question 5: A hemispherical bowl made of brass has inner diameter 10.5 cm. Find the cost of tin-plating it on the inside at the rate of ` 16 per 100 cm2. Question 4 Question 6
Read MoreQuestion 4: The radius of a spherical balloon increases from 7 cm to 14 cm as air is being pumped into it. Find the ratio of surface areas of the balloon in the two cases. Question 3 Question 5
Read MoreQuestion 3: Find the total surface area of a hemisphere of radius 10 cm. (Use π = 3.14) Question 2 Question 4
Read MoreQuestion 2: Find the surface area of a sphere of diameter: (i) 14cm (ii) 21cm (iii) 3.5m Question 1 Question 3
Read MoreQuestion 1: Find the surface area of a sphere of radius: (i) 10.5cm (ii) 5.6cm (iii) 14cm Ex: 13.3 | Question 8 Question 2
Read MoreQuestion 9: A river 3m deep and 40m wide is flowing at the rate of 2km per hour. How much water will fall into the sea in a minute? Question 8 Ex: 13.6 | Question 1
Read MoreQuestion 8: A solid cube of side 12 cm is cut into eight cubes of equal volume. What will be the side of the new cube? Also, find the ratio between their surface areas. Question 7 Question 9
Read MoreQuestion 7: A godown measures 40 m × 25 m × 15 m. Find the maximum number of wooden crates each measuring 1.5 m × 1.25 m × 0.5 m that can be stored in the godown. Question 6 Question…
Read MoreQuestion 6: A village, having a population of 4000, requires 150 litres of water per head per day. It has a tank measuring 20m×15m×6m. For how many days will the water of this tank last? Question 5 Question 7
Read MoreQuestion 5: The capacity of a cuboidal tank is 50000 litres of water. Find the breadth of the tank, if its length and depth are respectively 2.5 m and 10 m. Question 4 Question 6
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