Let the distance covered of x km by Avinash Time taken is ‘t’ hours, then Distance covered by Avinash= speed × time x = 70 × t ………………………(i) Distance covered by Rahul (1040 - x)km by Rahul. Distance covered by Rahul = speed × time (1040 – x) = 90 × (t – 8) ………………………(ii) Putting the value of ‘t’ in eq (ii) from eq (i) (1040 – x) = 90 × (x/70 – 8) 1040 - x = 9x/7 – 720 1040 + 720 = 9x/7 + x 1760 = 16x/7 x = 770 km
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A boy’s age is 125% of what it was 8 years ago, but 75% of what it will be after 8 years. What is his present age?
A girl’s age is 125% of what it was 10 years ago, but 75% of what it will be after 10 years. What is her present age?
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A is younger than B by 4 years. If the ratio of A and B ages is 9:10 respectively, then find the age of A.
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