a) 65 meters, 11 m/s. b) 45 meters, 19 m/s. c) 50 meters, 20 m/s. d) 55 meters, 11 m/s. correct answer is : a) 65 meters, 11 m/s. Explanation Lets the length of the train is ...
a)170 meters, 30 m/sec b) 173 meters, 26 m/sec c) 176 meters, 22 m/sec d) 180 meters, 20 m/sec correct answer is : c) 176 meters, 22 m/sec Explanation Let the length of the train is And ...
a) 8 hours 30 minutes b) 10 hours 30 minutes c) 12 hours 30 minutes d) 14 hours 30 minutes Correct answer is : d) 14 hours 30 minutes Explanation We know, time = In 1st case,The man ...
a) 3 hours 45 minutes b) 4 hours 30 minutes c) 3 hours 15 minutes d) 4 hours 15 minutes Correct answer is : a) 3 hours 45 minutes Explanation Let, the normal speed be ‘x’And the time ...
a) 8 km b) 10 km c) 12 km d) 15 km correct answer is : b) 10 km Explanation Let, the distance between two place is ‘d’ km.And the time taken by him is ‘t’ hour.In 1st ...
Explanation In this factorization formula used: (a + b)2 = (a2 + 2.a.b + b2) & (a – b)2 = (a2 – 2.a.b + b2) (p2 – q2) (x2 – s2) + 4pqxs {p2(x2 – s2) – ...
Explanation In this factorization formula used: (a + b)2 = (a2 + 2.a.b + b2) & (a – b)2 = (a2 – 2.a.b + b2) 4x2 – 4xy – 9y2 + y2 + 6yz – z2 {(4x2 – ...