time ,speed and distance Question no. 1 A man makes his upward journey at 16 km/h and downward journey at 28 km/h. What is his average speed ? looks_one 32 looks_two 56 looks_3 20.36 looks_4 22 Answer Option looks_3 20.36 Solution Solution : let the distance travel is x Question no. 2 During a journey of 80 km a train covers first 60km with a speed of 40 km/h and completes the remaining distance with a speed of 20 km/h. What is the average speed of the train during the whole journey? looks_one 30 looks_two 32 looks_3 36 looks_4 None of these Answer Option looks_two 32 Solution Solution : total distance = 80 km time taken to cover first 60 km = 60/40 = 1.5 hr time taken to cover remaining 20 km = 20/20 = 1 hr total time = 1.5 + 1 = 2.5 hr Question no. 3 A train running between two stations A and B arrives at its destination 10 minutes late when its speed is 50 km/h and 50 minutes late when it...

ratio and proportion Question no. 1 If 0.75: x: : 5:8, then x is equal to: looks_one 1.12 looks_two 1.20 looks_3 1.25 looks_4 1.30 Answer Option looks_two 1.20 Solution Solution : Question no. 2 A sum of money is to be distributed among A, B, C, D in the proportion of 5:2:4:3. If C gets Rs 1000 more than D, what is B’s share? looks_one Rs 500 looks_two Rs 1500 looks_3 Rs 2000 looks_4 None of these Answer Option looks_3 Rs 2000 Solution Solution : let x is the proportionality constant A = 5x , B = 2x , C = 4x , D = 3x 4x= 3x + 1000 x = 1000 B = 2x = 2*1000 = 2000 Question no. 3 There are 240 doctors and nurses at a hospital. If the ratio of doctors to nurses is 5:7, then the nurses at the hospital are looks_one 20 looks_two 60 looks_3 100 looks_4 none of these Answer option looks_4 none of these Solution Solution : let x is the proportionality constant D(Doctor) = 5x ...

Square, Cube, indices and Surds Question no. 1 A school has 4 section of Chemistry in Class X having 40, 35,45 and 42 students. The mean marksobtained in Chemistry test are 50, 60, 55 and 45 respectively for the 4 sections. Determine the overall average of marks per student looks_one 50.25 looks_two 52.25 looks_3 51.25 looks_4 53.25 Answer Option looks_two 52.25 Solution Solution : average marks = total marks / total students total marks = 50*40 + 60*35 + 55*45 + 45*42 = 8462 total students = 40 + 35 + 45 + 42 = 162 Average marks = 8462/ 162 = 52.25 Question no. 2 The mean of 30 values was 150. It was detected on rechecking that one value 165 was wrongly copied as 135 for the computation of the mean. Find the correct mean. looks_one 151 looks_two 149 looks_3 152 looks_4 None of these Answer Option looks_one 151 Solution Solution : Question no. 3 A car owner buys petrol at $7.50, $8.00 and $8.5...

Mensuration Question no. 1 The side and the height of a rhombus are 13 and 20 cms respectively. Find the area. looks_one 260 cm 2 looks_two 275 cm 2 looks_3 290 cm 2 looks_4 None of these Answer Option looks_one 260 cm 2 Solution Solution : side = 13 , height = 20 area = height * side = 20*13 = 260 cm 2 Question no. 2 If the ratio of areas of two squares is 9 : 1, the ratio of their perimeter is: looks_one 9:1 looks_two 3:4 looks_3 3:1 looks_4 1:3 Answer Option looks_3 3:1 Solution Solution : Question no. 3 A circle and a rectangle have the same perimeter. The sides of the rectangle are 18 cm and 26 cm. What is the area of the circle ? looks_one 88 cm 2 looks_two 154 cm 2 looks_3 1250 cm 2 looks_4 616 cm 2 Answer option looks_4 616 cm 2 Solution Solution : r is the radius of circle and a ,b are length and breadth of rectangle 2πr = 2(a+b) πr = a+ b = 18 ...