Question

There are 200 questions on a 3 hour examination . Among these questions are 50 mathematical problems . It is suggested that twice as much as time be spent on each maths problem as for every other problem . How much time should be spent on each mathematical problem ?

Answer 1

Answer:

86.4 sec.  or 1  1 1    min.

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Step-by-step explanation:

total mathematical problems = 50

tota other problems = 200-50 = 150

let the time spent on each other problem be x , then time spent on each mathematical problem be 2x

so total time spent on total other problems  = 150(x) or 150x and mathematical problems = 50(2x) = 100x

total time = 3 hr = 3(3600) = 10800 seconds

therefore ATP,

150x + 100x = 10800 sec.

250x = 10800 sec.

x = (10800/250)sec = 43.2 sec.

the time spent on each mathematical problem = 2x =2(43.2 sec.) = 86.4 sec.

or 1  11    min.

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