11. Cost of six chairs is Rs. 450
(a) Find the cost of 20 chairs.
(b) How many chairs can be purchased for Rs. 600?
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a) Cost of 6 chairs = Rs. 450
cost of 1 chair = 450/6
= Rs.75
cost of 20 chairs = 75 × 20
= Rs. 1500
b) with Rs.75 we can buy 1 chair
with Rs. 600 we can buy = 600/75
= 8 chairs
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