book Maths Puzzle Numerical Ability

Can you please help me with the following 2 questions.

Thanks

1.

A = P + PRT

SOLVE FOR T WHEN A = 70, P = 50 AND R = .1

2. FIND THE 3 CONSECUTIVE INTEGERS SUCH THAT

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book Other Question

how do i make this mixed fraction 14 5/12 a decimal?? two trains A and B are 110 km apart on a straight line .one train starts from A at 7am and travels toward b AT 20KM/HR..another train starts from B at 8 am and travels towards A at a speed of 25km/hr...at what time they will meet?

ans:
9am
10am
10.30am
11am