২৮৬৬২
A can complete a certain work in 4 minutes, B in 5 minutes, C in 6 minutes, D in 10 minutes and E in 12 minutes. The average number of units of work completed by them per minute will be
উত্তর
None of these
২৮৬৬৪
The average weight of 39 students is 30 kg. By the admission of a new student, the average comes down to 29.8 kg. Find the weigth of the new student.
উত্তর
22 kg
২৮৬৬৫
You can now buy 5 more Mangoes with TK. 75 due to the reduction in price by 20 percent. Calculate the current price of one dozen of Mangoes.
উত্তর
36
২৮৬৬৭
The maximum recommended pulse rate R, when exercising.for a person who is x years of age is given by the equation R = 176 - 0.8 x. what is the age, in years , of a person whose maximum recommended pulse rate when exercising is 140?
উত্তর
45
২৮৬৬৮
A boat goes 8 km in one hour along the stream and 2 km in one hour agaist the stream. The speed i km/hr of the stream is
উত্তর
3
২৮৬৬৯
Three consecutive eveb numbers are such that if the first is divided by 6, the second by 4 and the third by 7, the sum of the quotients is 38. Find the numbers.
উত্তর
66,68, 70