Question
∆ABC and ∆DEF are similar and their areas are
respectively 121 cm2 and 144 cm 2 . If EF = 24 cm BC is?Solution
Ratio of perimeter of similar triangles = ratio of the corresponding sides of similar triangles. (area of ∆ABC)/(area of ∆DEF)=(BC/EF) 2 121/144 = (BC/24) 2 (11/12) 2 = (BC/24) 2 11/12 = BC/24 BC = (11 × 24)/12 = 22 cm
A boy goes to school at 8 km/Hr and return at a speed of 7 km/hr. If he takes 15 hrs in all. Find the distance from his village to school?
The speed of two cars A and B are in the ratio of 13:17 respectively. Car A travels 16 km less than the car B in the same time duration. What was the di...
- A delivery van was going at 45 km/hr for ‘x’ hours and later sped up by 12 km/hr. It continued for (x + 3) hours more and covered 684 km during that ti...
Average speed of ‘A’ during a 24-hour journey is 40 km/h. If he covered the first 150 km of his journey at a speed of 25 km/h, then find the speed a...
Vicky and Vikram start running simultaneously around a rectangular track of length 900m from the same point at speeds of 50 km/hr and 40 km/hr. When wil...
A Bus covers its journey at a speed of 40km/hr in 8 hours. If the same distance is to be covered in 4 hours, then by how much % will be the speed of the...
A person traveled 140 km in 3 hours. For the first 2 hours, he traveled at 60 km/h. What was his speed during the last hour?
‘K’ and ‘L’ started moving towards each other at the same time with a speed of 50 km/hr and 40 km/hr, respectively. If the distance covered by �...
Two trains start at the same time from A and B and move towards each other at the rates of 10km/h and 27 km/h, respectively. When they meet, it is found...
Two individuals, P and R, travel from point L to point K at different speeds. P takes 11 hours to complete the journey, while R takes 13 hours. The diff...
Relevant for Exams:
