বাংলাদেশ পেট্রোলিয়াম ইন্সটিটিউট, পদঃ সহকারী পরিচালকMCQ Math Solution Exam Date: 18-12-2020

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0:00 Bangladesh Petroleum Institute

MCQ Math Solution
Exam Date: 18-12-2020
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0:17 19. A swimming pool is initially filled to a depth of 96 inches. After 2 weeks, the depth has decreased to 92½ inches. Assuming that the depth decreased at a constant rate, after how many days would the water depth have reached 93¾ inches?

01:44 20. In the co-ordinate plane, line m passes through the origin and has a slope of 3 . If points (6, y) and (x,12) are on the line m, then y-x= ?

02:57 21. A delivery cart went from Candleford to Lark Rise and back at an average speed of 2/3 miles per hour. If the distance from Candleford to Lark Rise is 1 mile, and the trip back took half as much time as the trip there, what was the average speed of the delivery cart on the way to Lark Rise?



04:55 22. The average of several exam scores is 80. One mark-up exam was given. Included with the other scores, the new average is 84. If the score on the mark-up exam was 92, how many total exams were given?

06:04 23. h=3a+28.6 ;A pediatrician uses the model above to estimate the height h of a boy, in inches in terms of boy’s age a, in years, between the ages of 2 and 5. Based on the model, what is the estimated increase in inches of a boy’s height each year?

07:05 24. A television with a price of $300 is to be purchased with an initial payment of $60 and weekly payments of $30. Which of the following equations can be used to find the number of weekly payments, w required to complete the purchase, assuming there are no taxes or fees?