If cost of $1$ dozen bananas is $₹60$, the cost of $1$ apple is$₹15$ and cost of $1$ mango is$₹20$. Find the total amount spent on $60$ bananas,$36$ apples and $42$ mangoes .

An insect which is climbing on a vertical pole in such a way that on one day it climbs a height of $2 \mathrm{m}$ on next day it comes down $1 \mathrm{m}$. If height of the pole is $12 \mathrm{m}$, find the no. of days in which it will reach the top.

Mr. Kamal buys 36 bananas for Rs. 20.52. How much money will be paid by him to buy 110 bananas? 

(A) Rs. 62.60 

(B) Rs. 62.90

 (C) Rs. 62.80 

(D) Rs. 62.70 

A car travels $80 \mathrm{km}$ in $4$ hours. If the distance covered by the car in one hour is $x \mathrm{km}$, then find the value of $x$.