self Maths Puzzle Logical Reasoning Blood Relations

15-mangoes and 7-apples cost as much as 10-mangoes and 9-apples. What is the ratio of cost of one
mango to cost of one apple?
a) 2:5 b) 5:2 c) 3:4 d) Cannot be determin

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self Other Question

A bridge will collapse in 17 minutes. 4 people want to cross it before it collapses. It is a dark night and there is only one torch between them. Only two people can cross at a time. "A" takes 1 minute to cross, "B" takes 2 minutes, "C" takes 5 and "D" takes 10 minutes. How do they all cross before the bridge collapses? A person sold his watch for 96 $ and got some percentage of profit which was numerically equal to the cost
price. What is the cost price of the watch
a) 50 $ b) 54 $ c) 60 $ d) 80 $