Reason- next number to 52 = (5+2)*52 = 7*52=364
next number to 364 = (3+6+4)*364 = 4732
next number to 4732 = (4+7+3+2)*4732 = 75712
next number to 75712 = (7+5+7+1+2)*75712 = 1665664
next number to 1665664 = (1+6+6+5+6+6+4)*1665664 = 56632576
The altitude of a circular cylinder is increased 12 times and the base area is decreased to one ninth of its value. The factor by which the lateral surface area of the cylinder increases is:
let the original height = h & base radius = R
Let the new radius = r and the new height be 12h
Now, pi r^2 = pi R^2/9 => r/R = â…“ => R=3r
Original lateral surface area / new lateral surface area = 2 pi *3r*h/2 pi*r*12h
new lateral surface area = 4* Original lateral surface area
Rishu can buy an article with market price 20000 Rs. How much can he save by choosing a better offer between three successive discounts of 20%, 20% and 10% and three successive discounts of 40%, 5% and 5%?
Shubham and Yash can complete a task in 30 days working together but Yash bailed out after 11 days of working together. Shubham carries on task and completes it in next 28 days. If Shubham had been working alone how many number of days would be taken to complete the task?
(Shubham+Yash)’s 11 days task = 11/30
Remaining work = (1-11/30) = 19/30
19/30 work done by Shubham in 28 days.
Whole work will be done by Shubham in(28*30/19) = 44.21 days.