161 The parameter of a square is equal to the perimeter of a rectangle of length 16 cm and breadth 14 cm. Find the circumference of a semicircle whose diameter is equal to the side of the square. (Round off your answer to two decimal places)? Mathematics Medium Full question → A 23.57 cm B 47.14 cm C 84.92 cm D 94.94 cm
162 A 25 cm wide path is to be made around a circular garden having a diameter of 4 meters. Approximate area of the path is square meters is__________? Mathematics Medium Full question → A 3.34 B 2 C 4.5 D 5.5
163 The circumferences of two circles are 264 meters and 352 meters. Find the difference between the areas of the larger and the smaller circles. Mathematics Medium Full question → A 4192 sq m B 4304 sq m C 4312 sq m D 4360 sq m
164 The parameter of a square is double the perimeter of a rectangle. The area of the rectangle is 480 sq cm. Find the area of the square. Mathematics Medium Full question → A 200 sq cm B 72 sq cm C 162 sq cm D Cannot be determined
165 The area of a square is 4096 sq cm. Find the ratio of the breadth and the length of a rectangle whose length is twice the side of the square and breadth is 24 cm less than the side of the square. Mathematics Medium Full question → A 18 : 5 B 7 : 16 C 5 : 14 D None of these
166 If two dice are thrown together, the probability of getting an even number on one die and an odd number on the other is__________? Mathematics Medium Full question → A 1/4 B 1/2 C 3/4 D 3/5
167 Out of first 20 natural numbers, one number is selected at random. The probability that it is either an even number or a prime number is_____________? Mathematics Medium Full question → A 1/2 B 16/19 C 4/5 D 17/20
168 If a number is chosen at random from the set {1, 2, 3, …., 100}, then the probability that the chosen number is a perfect cube is___________? Mathematics Medium Full question → A 1/25 B 1/2 C 4/13 D 1/10
169 A coin is tossed live times. What is the probability that there is at the least one tail? Mathematics Medium Full question → A 31/32 B 1/16 C 1/2 D 1/32
170 The probability that a number selected at random from the first 50 natural numbers is a composite number is__________? Mathematics Medium Full question → A 21/25 B 17/25 C 4/25 D 8/25
171 Three taps A, B and C can fill a tank in 12, 15 and 20 hours respectively. If A is open all the time and B and C are open for one hour each alternately, the tank will be full in_________? Mathematics Medium Full question → A 6 hours B 6 2/3 hours C 7 hours D 7 1/2 hours
172 A cistern can be filled by a tap in 4 hours while it can be emptied by another tap in 9 hours. If both the taps are opened simultaneously, then after how much time will the cistern get filled? Mathematics Medium Full question → A 4.5 hrs B 5 hrs C 6.5 hrs D 7.2 hrs
173 A tap can fill a tank in 6 hours. After half the tank is filled, three more similar taps are opened. What is the total time taken to fill the tank completely? Mathematics Medium Full question → A 3 hrs 15 min B 3 hrs 45 min C 4 hrs D 4 hrs 15 min
174 A large tanker can be filled by two pipes A and B in 60 minutes and 40 minutes respectively. How many minutes will it take to fill the tanker from empty state if B is used for half the time and A and B fill it together for the other half? Mathematics Medium Full question → A 15 min B 20 min C 27.5 min D 30 min
175 One pipe can fill a tank three times as fast as another pipe. If together the two pipes can fill the tank in 36 minutes, then the slower pipe alone will be able to fill the tank in: Mathematics Medium Full question → A 81 min. B 108 min. C 144 min. D 192 min.
176 A cistern is normally filled in 8 hours but takes two hours longer to fill because of a leak in its bottom. If the cistern is full the leak will empty it in. Mathematics Medium Full question → A 16 hrs B 20 hrs C 25 hrs D 40 hrs
177 One top can fill a cistern in 2 hours and another can empty the cistern in 3 hours. How long will they take to fill the cistern if both the taps are opened? Mathematics Medium Full question → A 5 Hours B 6 Hours C 7 Hours D 8 Hours
178 A top can fill a cistern in 8 hours and another can empty it in 16 hours. If both the taps are opened simultaneously the time (in hours) to fill the tank is Mathematics Medium Full question → A 8 B 10 C 16 D 24
179 Three pipes A, B and C can fill a tank in 6 hours. After working at it together for 2 hours. C is closed A and B can fill the remaining par in 7 hours. The number of hours taken by C alone to fill the tank is? Mathematics Medium Full question → A 10 B 12 C 14 D 16
180 Two pipes A and B can fill a cistern in 37 1/2 minutes and 45 minutes respectively. Both pipes are opened. The cistern will be filled in just half an hour, if the pipe B is turned off after? Mathematics Medium Full question → A 5 min B 9 min C 10 min D 15 min