A person travels a distance of 30 km at a speed of 60 km /hr and then comes back at twice the speed. How may minutes did he take in total?

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Jamal needs 8 hours to do a job. Kamal takes 10 hours to do the same job. How long should it take Kamal & Jamal working together to do the job?

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How many years does it take for interest Tk. 1000 to become equal to the interest to the interest on Tk. 20 in 8 years?

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Asif is designing a doll house. The floor will be in the shape of a rectangle whose length is 2 feet more than its width. How long should the doll house be if Asif wants the area of the floor to be 15 square feet?

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