For the following questions answer them individually
The average weight of P, Q and R is 45 kg. If the average weight of P and Q be 36.5 kg and that of Q and R be 52 kg, then what is the weight (in kgs) of Q?
A shopkeeper by selling 21 items earns a profit equal to the selling price of 1 item. What is his profit percentage?
To cover a distance of 144 km in 3.2 hours what should be the average speed of the car in meters/second?
If in 2 years at simple interest the principal increases by 18%, what will be the compound interest (in Rs) earned on Rs 7000 in 3 years at the same rate?
What is the sum of the first 12 terms of an arithmetic progression if the first term is -19 and last term is 36?
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