Nishit K Sinha Solutions for Chapter: Arithmetic, Exercise 8: Benchmarking Test 2

The following table shows the percentage change in the consumption of electricity by five towns P, Q, R, S, and T from $1986$to $1988$:

In town T, where $50,000$ units were consumed in $1986$, how much did it consume in $1988$?

Amar, Akbar, and Anthony are friends, being looked after by a matron Farah, Amar weighs $50\%$ more than Akbar and Anthony weighs $25\%$ less than Amar. Farah weighs a third of the combined weight of the three boys. All four together weigh $232 \mathrm{kg}$. What is the correct sequence of the persons in the ascending order of their weights?

In a family, a couple has a son and a daughter. The age of the father is three times that of his daughter and the age of the son is half of his mother. The wife is nine years younger to her husband and the brother is seven years older than his sister. What is the average age of the mother and son?

Sharat is walking down a descending escalator and takes $40$ steps to reach the bottom. Chandra start simultaneously from the bottom, taking two steps for every one step taken by Sharat. Time taken by Sharat to reach the bottom from the top is the same as the time taken by Chandra to reach the top from the bottom. How many more steps did Chandra take than Sharat before they crossed each other on the escalator?

Two brothers Kumar Kalyan and Amar Kumar are walking around a circular track of length $1800 \mathrm{m}$, with a speed of $40 \mathrm{m}/\min$ and $50 \mathrm{m}/\min$, respectively. Both of them start in the same direction simultaneously, but Amar Kumar reverses his direction every time he completes one round. After how much time (in minute) from the start, will they meet for the first time?

Two friends Karan and Arjun start running around a circular track in the same direction. Karan and Arjun take one full round in $7 \min$ and $4 \min$, respectively. After how much time, will they meet at the diametrically opposite points of their starting point?

The analysis of the recently held CBSE exams shows that Chennai zone, Delhi zone and Ajmer zone have performed the best. The average marks of the Ajmer zone and the Delhi zone put together is $71\%$. The average marks of the Chennai zone and the Delhi zone put together is $76\%$ and the average marks of the Ajmer zone and the Chennai zone put together is $79\%$. What is the range of the average marks of all the three zones (Assume N) put together?

Two fuel tanks, one shaped like a cylinder and other like a cone, contain fuel. The cylindrical tank holds $500$litres more fuel than the conical fuel. After $200$litres of fuel have been taken out from each tank, the cylindrical tank contains twice the quantity of fuel in the conical tank. How many litres of fuel did the cylindrical tank have when it was full?