Q2-
In triangle ABC, given D and E are midpoints of sides AB and AC respectively and DE is parallel to BC. If the length of the DE is 19cm, then what length is the side BC?
(A) 19cm (B) 9.5cm (C) 38cm (D) 29cm (E) Cannot be found
Q3-
The telephone call plan bought by Jenny costs 50 cents per call for the first 100 calls, 40 cents per call for the next 100 calls and 30 cents per call for all the calls exceeding 200. How many calls can she make for $80?
Q20-
If Leonard can paint a house in 5 hours and Edward can paint a house of exactly same size in 7 hours, then find the number of hours it will take to paint the house if both work together?