navodaya Exam Numerical Ability Time Distance and Speed

Points A and B are 90 km apart from each other on a highway. A car starts from A and another from B at the same time. If they go in the same direction they meet in 9 hours and if they go in opposite directions they meet in 9/7 hours. Find their sppeds.

Read Solution (Total 1)

40, 30 kmph

Let the speeds of cars starting from A & B be a & b kmph respectively.
Travelling in same direction, let the cars meets at a distance 'd' from B, then
(90+d)/A = d/B = 9
=> A - B = 10 ——(i)
Travelling in opposite directions, 90/(A+B)=9/7
=> A+B=70 ——(ii)
Solving (i) & (ii), A=40, B=30
6 years agoHelpfull: Yes(0) No(0)

navodaya Other Question

ON SELLING A TEA SET AT 5% LOSS AND A LEMON SET AT GAIN OF 15% A CROCKERY SELLER GAINS RS 7 .IF HE SELLS THE TEA SET AT 5% GAIN AND THE LEMON SET AT 10% GAIN , HE GAINS RS 13.THE ACTUAL PRICE OF THE LEMON SET IS saina was given some money by her father on her birthday ,saina spent all of it in five shops .In each shop one rupee more than half of what she had when she came in.How much did she get from her father