If each side of a rectangle is increased by 50%, its area will increase by

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A boat running upstream takes 8 hours 48 minutes to cover a certain distance, while it takes 4 hours to cover the same distance running downstream. What is the ratio between the speed of the boat and the speed of the water current respectively?

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3 coins are tossed at random, show the sample space and find the the probability of getting: 

i. One head two tails 

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A, B and C can complete an work in 12, 15 and 25 days resctively. A and B started working together where area C worked with them in every third day. find the number of days required to complete the work.

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The price of a shirt and a pant together is Tk. 1, 300 . If the price of the shirt increases by 5% and that of the pant by 10% , it costs Tk. 1,405 to buy those two things. Find the respective price of a shirt and a pant.

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Twice the width of a rectangle is 10 meters more the its length. If the area of the region enclosed by the rectangle is 600 square meters , then find its perimeter.

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