In a class, there are 40 boys and 80 girls. What is ratio of the number of boys to the number of girls?

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(a)

Give two equivalent ratios of 3 : 5.

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Find the ratio of 40 cm to 1.5 m.

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Convert the ratio 40: 35 into simplest form.

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Find the value of x, if 16 : 24 : : x : 30.

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If cost fo 12 pens is Rs. 96, then find the cost of 8 such pens.

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If 12 boxes are required to store 192 kg of fruits, then how many boxes are required to store 160 kg?

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(a)

The temperature increased 30°C in the last 60 days. If the rate of temperature increased remains the same, then how many degrees will the temperature increase in next 20 days?

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Are the ratio 10 g : 40 g and 25 kg : 100 kg in proportion?

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3 dozen pens cost is Rs.72.How much 2 dozen pens cost?

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30% of Zuben's house area is equal to 40% of Seema's house area. Express as a ratio, Zuben's house area to Seema's house area.

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Convert 60 : 45 in its simplest form.

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(a)

Find two equivalent ratio of 3: 7.

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(a)

Can you think of some more examples where you have to divide a number of things in some ratio? Frame three such examples and ask your friends to solve them.
The semi-perimeter of a room is 50 m. The ratio of the dimensions of the room is 3:2. Find the length and breadth of the room.

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(a)

Can you think of some more examples where you have to divide a number of things in some ratio? Frame three such examples and ask your friends to solve them.
Two employees donated Rs. 1000 in National Draught Fund. The ratio of the contributions made by both is 5 : 3. Find their respective contributions.

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(a)