10. If 10 workers, working for 4 hours complete the work in 12 days, in how many days will 8 workers working for 6 hours complete the same work?
11. The freight for 75 quintals of goods is Rs. 375. Find the freight for 42 quintals.
12. A car travels 228 km in 3 hours. (a) How long will it take to travel 912 km? (b) How far will it travel in 7 hours?
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