B. K Editorial Board Solutions for Exercise 10: Exercise 10

A can run $1 km$ in $4$ min $54$ seconds and B in $5$ mintues. How many meters start can A give B in a $km$ race, so that the race may end in a dead heat?

In a barrack of soldiers there was stock of food for $190$ days for $4000$ soldiers. After $30$ days, $800$ soldiers left the barrack. For how many days shall the left over food last for the remaining soldiers?

A merchant has $1000 kg$ of sugar, part of which he sells at $8\%$ profit and the rest at $18\%$ profit. He gains $14\%$ on the whole. The quantity sold at $8\%$ profit is-

The average of $6$ numbers is $30$. If the average of first four is $25$ and that of lqast three is $35$, the fourth number is-

What value will come in the place of the question mark $(?)$in the following question$?$.

$50+50\%$ of $50=?$

If the price of an eraser is reduced by $25\%$, a person can buy $2$ more erasers for a rupee. How many erasers are available for a rupee?

What must be subtracted from each one of $21, 38, 55, 106$ so that the remainders are proportional?

How much simple interest will rupees $2,000$ earn in $18$ months at $6\%$ per annum?