Question

There are 200 question on a 3 hr examination.Among these question are 50 mathematics.It is suggested that twice as much time be spent on each math problem as for each other question.How many minutes should be spent on mathematics problem???​

Answer 1

let the time taken for one question be x

then math question takes 2x

remaining questions otherthan math questions are 150

thentime taken for the remaining questions is 150x

time taken to solve math questions =50*2x=100x

100x+150x=10800s(3hr)

250x=10800s

x=250/10800=43.2

then time taken for math problems =43.2*50=2160s*2=4320s(72m)

Hope! it will help you